1. 1. Blanca, A., Ceballos, M., 2016 MCDM: Multi-Criteria Decision Making Methods for Crisp Data. R Software Package, Version 1.2.
   2. Y. Liu, Z. Li, H. Xiong, X. Gao, J. Wu and S. Wu 2013, “Understanding and Enhancement of Internal Clustering Validation Measures,” IEEE Transactions on CYBERNETICS, Vol.43, No.3, pp. 982-994.
   3. Goyal, M.K., and Gupta V. 2014 Identification of homogeneous rainfall regimes in Northeast Region of India using fuzzy cluster analysis. Water Resources Management, 28(13), 4491-4511.
   4. Hosking, J.R.M. 1990 L-Moments: analysis and estimation of distributions using linear combinations of order statistics. J R Stat Soc Ser B 52:105–124
   5. Hosking, J.R.M., Wallis J.R. 1997 Regional frequency analysis: an approach based on L-moments. Cambridge Univ. Press, Cambridge, UK.
   6. Hubert, L., and Levin, J. 1976. A general statistical framework for assessing categorical clustering in free recall. Psychologica Bulletin 1072–1080.
   7. Krzanowski,W., and Lai, Y. 1988. A criterion for determining the number of groups in a data set using sum-ofsquares clustering. Biometrics 44 23–34.
   8. Mahanta, R, Sarma, D and Choudhury, A. 2013 Heavy rainfall occurrences in northeast India. International Journal of Climatology, 33:1456-1469.
   9. Wu, X., Zurita-Milla, R. and Kraak, M.J. 2013 Visual discovery of synchronization in weather data ast multitemporal resolutions. The Cartographic Journal 50 (3), 247- 256.