Alijani, B. & Kaviani, M. R., (2019), Fundamentals of climatology, 21st Edition, Tehran: Samt Press
Azizi, GH. & Safarkhani, E., (2002), “Evaluation of Drought and Its Effect on the Yield of Dryland Wheat in Ilam Province with an Emphasis on the Recent Years (1998-2000) Droughts”, The Journal of Spatial Planning, 6(2): 61-79.
Babaee, O. & Alijani, B., (2013), “Spatial Analysis of Long Duration Droughts in Iran”, Physical Geography Research Quarterly, 45(3): 1-12.
Blekinsop, S. & Fowler, H. J., (2007), “Changes in Drought Frequency, Severity and Duration for the British Isles Projected by the PRUDENCE Regional Climate Models”, Journal of Hydrology, 342: 50–71.
Byun, H. R. & Wilhite, D. A., (1999), “Objective Quantification of Drought Severity and Duration”, Journal of Climate, 12(9): 2747-2756.
Doostan, R., (2020), “Analysis of Drought Researches in Iran”, Journal of Spatial Analysis Environmental Hazards, 6 (4): 53-94.
Fanni, Z., Khalilollahi, H. A., Sajjadi, J. & Falsoleiman, M., (2016), “Analysis of the Causes and Consequences of Drought in South Khorasan Province and Birjand”, The Journal of Spatial Planning, 20(4): 175-200.
Ghorbani, H., Vali, A. & Zarepour, H., (2019), “Analysis of the Climatological Drought Trend Variations using Mann-Kendall, Sen and Pettitt Tests in Esfahan Province”, Journal of Spatial Analysis Environmental Hazards, 6 (2): 129-146.
Hobbins, M., Dai, A., Roderick, M. L. & Farquhar, G. D., (2008), “Revisiting the Parameterization of Potential Evaporation as a Driver of Long-Term Water Balance Trends”, Geophysical Research Letters, 35(12): 1-6.
Hosseini, A., Ghavidel, Y., Khorshiddoust, A. M. & Farajzadeh, M., (2020), “Spatio-temporal Analysis of Dry and Wet Periods in Iran by Using Global Precipitation Climatology Center - Drought Index (GPCC –DI)”, Theoretical and Applied Climatology, Published online 24 November 2020, 1-11.
Karimi, H., Zeidali, A. & Omidipour, R., (2018), “Technical Note: Evaluation the Effect of Standard Precipitation Index on The Rainfed Wheat Yield in Ilam Province”, Watershed Engineering and Management, 9(4): 493-499.
Moghaddasi, M., Morid, S., Ghaemi, H. & Mohammadvali Samani, J., (2005), “Daily Monitoring of Drought in Tehran Province”, Iranian Journal of Agriculture Science, 36(1): 51-62.
Mostafazadeh, R. & Zabihi, M. (2016). Comparison of SPI and SPEI Indices to Meteorological Drought Assessment Using R Programming (Case study: Kurdistan Province). Journal of the Earth and Space Physics, 42(3), 633-643.
Nosrati, K., (2015), “Evaluation of Standardized Precipitation-Evapotranspiration Index (SPEI) to Identify Drought in Different Climates of Iran”, Environmental Sciences, 12(4): 63-74.
Paulo, A. A., Rosa1, R. D. & Pereira, L. S., (2012), “Climate Trends and behavior of Drought Indices Based on Precipitation and Evapotranspiration in Portugal”, Nat. Hazards Earth Syst. Sci., 12: 1481–1491.
Savari, M. & Eskandari damaneh, H., (2019), “The Role of Participatory Management in Empowering Local Communities in Coping with Droughts in Southern Kerman Province”, The Journal of Spatial Planning, 23(2): 123-171.
Shabanali Fami, H., Savari, M., Motaghed, M., Mohammadzadeh Nasrabadi, M., Afshari, S. & Baghaee, M., (2020), “Formulating and Analysis of Adaptation Strategies of Farmers to Drought Conditions in Isfahan Province Using TOWS Matrix”, The Journal of Spatial Planning, 24(1): 21-47.
Spinoni, J., Naumann, G., Vogt, J. V. & Barbosa, P., (2015), “The Biggest Drought Events in Europe from 1950 to 2012”, Journal of Hydrology: Regional Studies, 3:509–524.
Vicente-Serrano, S. M., Begueria, S. & Lopez-Moreno, J. I., (2010), “A Multiscalar Drought Index Sensitive to Global Warming: The Standardized Precipitation Evapotranspiration Index”, Journal of Climate, 23(7): 1696-1718.
Vicente-Serrano, S. M., Begueria, S., Lorenzo-Lacruz, J., Camarero, J. J., Lopez-Moreno, J. I., Azorin-Molina, C., Revuelto, J., Moran-Tejeda, E. & Sanchez-Lorenzo, A., (2012), “Performance of Drought Indices for Ecological, Agricultural, and Hydrological Applications”, Earth Interactions, 16(10): 1-27.
Wang, K. Y., Li, Q. F., Yang, Y., Zeng, M., Li, P. C. & Zhang, J. X., (2015), “Analysis of Spatio-Temporal Evolution of Droughts in Luanhe River Basin Using Different Drought Indices”, Water Science and Engineering, 8(4): 282-290.
Wilhite, D. A., Svoboda, D. & Hayes, M. J., (2007), “Understanding the Complex Impacts of Drought: A Key to Enhancing Drought Mitigation & Preparedness”. Water Resour. Manag. 21(5): 763-774.
Zare Abianeh, H., GHobaeisoogh, M. & Mosaedi, A., (2015). “Drought Monitoring Based on Standardized Precipitation Evaoptranspiration Index (SPEI) Under the Effect of Climate Change”, Journal of Water and Soil, 29(2), 374-392.
Zare Abianeh, H., Yazdany, V. & Azhdary, Kh., (2010), “Comparative Study of Four Meteorological Drought Index Based on Relative Yield of Rain Fed Wheat in Hamedan Province”, Physical Geography Research Quarterly, 41(69): 35-49.
Zhang, Y., Li, G., Ge, J., Li, Y., Yu, Z. & Niu, H., (2019), “SC-PDSI Is More Sensitive to Precipitation Than to Reference Evapotranspiration in China During the Time Period 1951–2015”, Ecological Indicators 96: 448–457.
Zhao, H., Gao, G., An, W., Zou, X., Li, H. & Hou, M., (2017), “Timescale Differences Between SC-PDSI And SPEI for Drought Monitoring in China”, Physics and Chemistry of the Earth, 102: 48-58.