[1] Zadeh, L. A. (1965). Fuzzy sets. Information and control, 8(3), 338-353.
[2] Atanassov, K. T. (1994). New operations defined over the intuitionistic fuzzy sets. Fuzzy sets and systems, 61(2), 137-142.
[3] Atanassov, K. (1999). Intuitionistic fuzzy sets: theory and applications, physica-verlag, heidelberg. International journal of advanced computer science and applications, 14-17.
[4] Davvaz, B., & Hassani Sadrabadi, E. (2016). An application of intuitionistic fuzzy sets in medicine. International journal of biomathematics, 9(03), 1650037.
[5] De, S. K., Biswas, R., & Roy, A. R. (2001). An application of intuitionistic fuzzy sets in medical diagnosis. Fuzzy sets and systems, 117(2), 209-213.
[6] Ejegwa, P. A., & Onasanya, B. O. (2019). Improved intuitionistic fuzzy composite relation and its application to medical diagnostic process. Note IFS, 25(1), 43-58.
[7] Szmidt, E., & Kacprzyk, J. (2001, October). Intuitionistic fuzzy sets in some medical applications. International conference on computational intelligence (pp. 148-151). Springer, Berlin, Heidelberg.
[8] Szmidt, E., & Kacprzyk, J. (2004). Medical diagnostic reasoning using a similarity measure for intuitionistic fuzzy sets. Note on IFS, 10(4), 61-69.
[9] Todorova, L., Atanassov, K., Hadjitodorov, S., & Vassilev, P. (2007). On an intuitionistic fuzzy approach for decision making in medicine: part 1. International journal bioautomation, 6, 92.
[10] Todorova, L., Atanassov, K., Hadjitodorov, S., & Vassilev, P. (2007). On an intuitionistic fuzzy approach for decision making in medicine: part 2. International journal bioautomation, 7, 64-69.
[11] Boran, F. E., & Akay, D. (2014). A biparametric similarity measure on intuitionistic fuzzy sets with applications to pattern recognition. Information sciences, 255, 45-57.
[12] Hatzimichailidis, A. G., Papakostas, G. A., & Kaburlasos, V. G. (2012). A novel distance measure of intuitionistic fuzzy sets and its application to pattern recognition problems. International journal of intelligent systems, 27(4), 396-409.
[13] Wang, W., & Xin, X. (2005). Distance measure between intuitionistic fuzzy sets. Pattern recognition letters, 26(13), 2063-2069.
[14] Ejegwa, P. A., Akubo, A. J., & Joshua, O. M. (2014). Intuitionistic fuzzy set and its application in career determination via normalized Euclidean distance method. European scientific journal, 10(15).
[15] Ejegwa, P. A., Akubo, A. J., & Joshua, O. M. (2014). Intuitionistic fuzzy sets in career determination. J. of Inform. and Computing Sci, 9(4), 285-288.
[16] Ejegwa, P. A., & Onyeke, I. C. (2018). An object oriented approach to the application of intuitionistic fuzzy sets in competency based test evaluation. Ann. Commun. Math, 1(1), 38-47.
[17] Liu, P., & Chen, S. M. (2016). Group decision making based on Heronian aggregation operators of intuitionistic fuzzy numbers. IEEE transactions on cybernetics, 47(9), 2514-2530.
[18] Chiang, D. A., & Lin, N. P. (1999). Correlation of fuzzy sets. Fuzzy sets and systems, 102(2), 221-226.
[19] Hung, W. L., & Wu, J. W. (2002). Correlation of intuitionistic fuzzy sets by centroid method. Information sciences, 144(1-4), 219-225.
[20] Murthy, C. A., Pal, S. K., & Majumder, D. D. (1985). Correlation between two fuzzy membership functions. Fuzzy sets and systems, 17(1), 23-38.
[21] Ejegwa, P. A. (2020). Modified and generalized correlation coefficient between intuitionistic fuzzy sets with applications. Retrieved from https://www.researchgate.net/profile/Ejegwa_Paul_Augustine/publication/341902780_Modified_and_generalized_correlation_coefficient_between_intuitionistic_fuzzy_sets_with_applications/links/5ed8d821299bf1c67d3bdf10/Modified-and-generalized-correlation-coefficient-between-intuitionistic-fuzzy-sets-with-applications.pdf
[22] Mitchell, H. B. (2004). A correlation coefficient for intuitionistic fuzzy sets. International journal of intelligent systems, 19(5), 483-490.
[23] Xuan Thao, N. (2018). A new correlation coefficient of the intuitionistic fuzzy sets and its application. Journal of intelligent & fuzzy systems, 35(2), 1959-1968.
[24] Xu, Z., Chen, J., & Wu, J. (2008). Clustering algorithm for intuitionistic fuzzy sets. Information sciences, 178(19), 3775-3790.
[25] Hong, D. H., & Hwang, S. Y. (1995). Correlation of intuitionistic fuzzy sets in probability spaces. Fuzzy sets and systems, 75(1), 77-81.
[26] Zeng, W., & Li, H. (2007). Correlation coefficient of intuitionistic fuzzy sets. Journal of industrial engineering international, 3(5), 33-40.
[27] Gerstenkorn, T., & Mańko, J. (1991). Correlation of intuitionistic fuzzy sets. Fuzzy sets and systems, 44(1), 39-43.
[28] Hung, W. L. (2001). Using statistical viewpoint in developing correlation of intuitionistic fuzzy sets. International journal of uncertainty, fuzziness and knowledge-based systems, 9(4), 509-516.
[29] Hung, W. L., & Wu, J. W. (2002). Correlation of intuitionistic fuzzy sets by centroid method. Information sciences, 144(1-4), 219-225.
[30] Park, J. H., Lim, K. M., Park, J. S., & Kwun, Y. C. (2009). Correlation coefficient between intuitionistic fuzzy sets. Fuzzy information and engineering Volume 2 (pp. 601-610). Springer, Berlin, Heidelberg.
[31] Bustince, H., & Burillo, P. (1995). Correlation of interval-valued intuitionistic fuzzy sets. Fuzzy sets and systems, 74(2), 237-244.
[32] Liu, B., Shen, Y., Mu, L., Chen, X., & Chen, L. (2016). A new correlation measure of the intuitionistic fuzzy sets. Journal of intelligent & fuzzy systems, 30(2), 1019-1028.
[33] Garg, H., & Kumar, K. (2018). A novel correlation coefficient of intuitionistic fuzzy sets based on the connection number of set pair analysis and its application. Scientia Iranica. Transaction E, industrial engineering, 25(4), 2373-2388.
[34] Garg, H. (2018). Novel correlation coefficients under the intuitionistic multiplicative environment and their applications to decision-making process. Journal of industrial & management optimization, 14(4), 1501.
[35] Garg, H., & Rani, D. (2019). A robust correlation coefficient measure of complex intuitionistic fuzzy sets and their applications in decision-making. Applied intelligence, 49(2), 496-512.
[36] Thao, N. X., Ali, M., & Smarandache, F. (2019). An intuitionistic fuzzy clustering algorithm based on a new correlation coefficient with application in medical diagnosis. Journal of intelligent & fuzzy systems, 36(1), 189-198.
[37] Atanassov, K. T. (1994). New operations defined over the intuitionistic fuzzy sets. Fuzzy sets and systems, 61(2), 137-142.