Bocco, G. (1991). Gully erosion processes and models. Progress in physical Geography, 35(6), 392-406.
 Desmet, P.J.J., Poesen, J., Goverse,G. and Vandaele, K. (1999). Importance of slope gradient and contribution area for optimal predicting of the initiation and trajectory of ephemeral gullies, Catena.37: 377-392.
 Lesschen, J.P., Kok, K., Verurg, P.H. and Cammeraat, L.H. (2007). Identification of vulnerable areas for gully erosion under different scenarios of land abandonment in Southeast Spain. Catena 71: 110–121
 Martinez – Casasnovas, J.A. (2004). Assessment of sidewall erosion in large gullies using multitemporal DEMs and logistic regression analysis. Geomorphology 58.305–321.
 Nazari Samani, A. A. (2008). The study of effective mechanisms in gully erosion in order to determine the topographic thresholds, runoff and sediment contribution. Ph.D. Thesis. Tehran University of Medical Sciences.
 Nazari Samani, A., Ahmadi, H., Jafari, M., Guy, B., Ghoddousi, J. and Malekian, A. (2009). Geomorphic threshold conditions for gully erosion in Southwester Iran (Boushehr-Samal watershed). Journal of Asian Earth Sciences, 35: 180-189.
 Nazari Samani, A., Wasson, R.J. and Malekian, A. (2011). Application of multiple sediment fingerprinting techniques to determine the sediment source contribution of gully erosion: Review and case study from Boushehr province, southwestern Iran. Progress in Physical Geography, 35(3): 375–391.
 Morgan, R.P.C. (2005). Soil erosion and conservation, Blackwell. 304 p.
 Poesen, J., Nachtergaele, J., Verstraeten, G. and Valentin C. (2003). Gully erosion and environment change: importance and research needs, Catena, 50, 91-133.
 Poesen, J., Vandaele, K. and van Wesemael, B. (1998). Gully erosion: importance and model implications. In: Boardman, J., Favis-Mortlock, D.T. (Eds.), Modelling Soil Erosion by Water Springer-Verlag, Berlin NATO-ASI Series, I-55:285-311.
 Prosser, I.P. and Abernethy, B. (1996). Predicting the topographic limits to a gully network using a digital terrain model and process thresholds. Water Resources Research 32 (7), 2289– 2298.
 Rahi, Gh. R. (1998). Investigate the mechanisms and causes of gully formation. Seminar of MsC in Watershed, Tarbiat Modarres University.
 Rahi, Gh. R. (1998). Investigate the mechanisms and causes of gully formation in Genaveh. Seminar of MsC in Watershed.
 Rahi, Gh. R. (2011). Investigation of morphoclimatic properties of gully in Bushehr province. Final report of the research project. Tehran Soil and Watershed Management Institute. 148p.
 Rahi, Gh. R. (2012). Calibration, validation and completion of land susceptibility prediction model for gully erosion in dry and semi arid basins of Bushehr province. Final report of the research project. Tehran Soil and Watershed Management Institute. 150p.
 Refahi, H. Gh. (1996). Water erosion and control. Tehran University Press.
 Refahi, H. (2006). Water erosion and conservation. 2nd edition, Tehran University Press, 671p, (In Persian).
 Soufi, M. and Z. Abolverdi. (2008). Investigation of topographic threshold in development of gullies in the Fars Province. 1st National Conference of Management and Agricultural Development in Iran, 4pages (in Persian).
 Solyeimanpour, S. Sofi, M. and Ahmadi, H. (2007). Investigating the Factors Affecting Gully Erosion. Sediment Production and Soil Loss in Gouraspid Region of Fars Province. Conference on Engineering Geology and Environment
 Vandaele, K., Poesen, J., Govers, G. and van Wesemael, B. (1996). Geomorphic threshold conditions for ephemeral gully incision. Geomorphology 16 (2), 161– 173.
 Vandekechove, L., Poesen, J., Oostwoud wijdenes, D., Nachtengaele, J., Kosmas, C., Roxd, M.J. and Figueiredo, T.De. (2000). Thresholds for Gully initiation and sedimentation in Mediterranean Europe, Earth surface processes and land forms. 25: 1201-1220.
 Vandekerckhove, L., Poesen, J. and Govers, G. (2003). Medium Term gully headcut rates in southeast spain determined from aerial photographs and ground measurements. Catena, 50, 329-352.