Agrawala, S., Barlow, M., Cullen, H., and Lyon, B. (2001). The Drought and Humanitarian Crisis in Central and Southwest Asia: A Climate Perspective, IRI Special Report N. 01-11. International Research Institute for Climate Prediction, Palisades, p. 24.
Alijani, B., Jafarpour, Z., and Ghobadi, G, J. (2005).Analysis of the Droughts in the Southern coastal areas of the Caspian Sea. Journal of Territory, 2(7), 11-23.
Ahmadi, F. and Radmanesh, F. (2014). Trend analysis of monthly and annual mean temperature of the northern half of Iran over the last 50 years. Journal of Water and Soil, 28(4), 757-768.
Bari Abarghouei, H., Asadi Zarch, M. A., Dastorani, M. T., Kousari, M. R., and Safari Zarch, M. (2011). The survey of climatic drought trend in Iran. Stochastic Environmental Research and Risk Assessment, 25,851–863.
Bazrafshan, J., Nadi, M., and Ghorbani, K. (2015). Comparison of Empirical Copula-Based Joint Deficit Index (JDI) and Multivariate Standardized Precipitation Index (MSPI) for Drought Monitoring in Iran. Water Resources Management, 1-18. DOI 10.1007/s11269-015-0926-x
De Michele, C. and Salvadori, G. (2003). A Generalized Pareto intensity-duration model of storm rainfall exploiting 2-copulas. Journal of Geophysical Research, 108(D2), 4067.
Dracup, J. A. Lee, K. S., and Paulson, E. G. R. (1980). On the definition of droughts. Water Resources Research, 16, 297-302.
Genest, C. and Rivest, L. P. (1993). Statistical inference procedures for bivariate Archimedean copulas. Journal of the American Statistical Association, 88 (423), 1034–1043.
Kao, S. C. and Govindaraju, R. S. (2010). A copula-based joint deficit index for droughts. Journal of Hydrology, 380, 121-134.
Kousari, M. R. and Asadi Zarch, M. A. (2011). Minimum, maximum, and mean annual temperatures, relative humidity, and precipitation trends in arid and semi-arid regions of Iran. Arabian Journal of Geosciences
, 4(6), 907-914.
Loukas, A. and Vasiliades, L. (2004). Probabilistic analysis of drought spatiotemporal characteristics in Thessaly region, Greece. Natural Hazards and Earth System Sciences, 4, 719–731.
McKee, T. B., Doeskin, N. J., and Kleist, J. (1993). The relationship of drought frequency and duration to time scales. In Proceedings of the 8th Conference on Applied Climatology, Pp. 179-184. January 17-22, Anaheim, California.
Mirabbasi, R., Anagnostou, E. N., Fakheri-Fardm, A., Dinpashoh, Y., and Eslamian, S. (2013). Analysis of Meteorological Drought in Northwest Iran using the Joint Deficit Index. Journal of Hydrology, 492, 35-48.
Mirabbas, R. and Dinpashoh, Y. (2012). Trend analysis of precipitation of NW of Iran over the past half of the century. Irrigation Sciences and Engineering (Scientific Journal of Agriculture), 35(4), 60-73. (In Farsi)
Mirabbasi R., Fakheri-Fard, A., and Dinpashoh, Y. (2012). Bivariate drought frequency analysis using the Copula method. Theoretical and Applied Climatology. 108: 191–206.
Mishra, A. K. and Singh, V. P. (2010). A review of drought concepts. Journal of Hydrology, 391, 202–216.
Moradi, H. R. (2004). Effect of Caspian Sea in the precipitation of northern costs of Iran. Journal of Marine Science and Technology, 3(2), 77-87.
Nelsen, R. B. (2006). An Introduction to Copulas. Springer, New York, 269 pp.
Omidi, M. Mohammadzadeh
, M. and Morid, S. (2010). The Probabilistic Analysis of Drought Severity–Duration in Tehran Province using Copula Functions. Iranian Journal of Soil and Water Research,
41(1): 95-101. (In Farsi)
Shiau, J. T. (2006). Fitting drought duration and severity with two-dimensional copulas. Water Resources Management, 20, 795–815.
Shiau, J. T. and Modarres, R. (2009). Copula-based drought severity-duration-frequency analysis in Iran. Meteorological Applications, 16, 481–489.
Sklar, A. (1959). Distribution functions of n Dimensions and Margins. Publications of the Institute of Statistics of the University of Paris, 8, 229-231.
Song, S. and Singh, V. P. (2010a). Meta-elliptical copulas for drought frequency analysis of periodic hydrologic data. Stochastic Environmental Research and Risk Assessment, 24, 425–444.
Song, S. and Singh, V. P. (2010b). Frequency analysis of droughts using the Plackett copula and parameter estimation by genetic algorithm. Stochastic Environmental Research and Risk Assessment, 24, 783–805.
Wilhite, D. A. (1993). Drought Assessment, Management and Planning: Theory and Case Studies. Kluwer Academic Publishers, USA, 293 pp.
Wilhite, D. A. (2000). Drought as a natural hazard: concepts and definitions.Drought, a global assessment, 1, 3-18.
Wong, G., Lambert, M. F., Leonard, M., and Metcalfe, A. V. (2010). Drought analysis using trivariate copulas conditional on climatic states. Journal of Hydrologic Engineering, 15(2), 129-141.