1. Afsin M (1991) Hydrogeological investigation of Afyon Sandıklı Kuruçay plain and Hüdai spa, Ankara University. Doctoral Thesis (in Turkish-unpublished)
2. Afsin M (1997) Hydrochemical evolution and water quality along the groundwater flow path in the Sandikli plain, Afyon, Turkey. Environ Geol 31(3/4):221–230
3. Afsin M, Canik B (1996) Hydrogeological and hydrochemical study of the Hudai (Sandikli, Afyon, Turkey) thermal mineral springs and interpretation of their genesis. J Geosound 28:69–86 (in Turkish)
4. Afsin M, Dağ T, Davraz A, Aksever F, Karakaş Z (2012) The origin and sustainability of Hudai geothermal waters, Sandıklı, Afyonkarahisar, Turkey. In: 39th IAH congress, 16–21 September 2012, Niagara Falls, Canada, pp 288–289
5. Afsin M, Davraz A, Karakas Z, Hınıs MA, Aksever F (2013) Hydrogeological, hydrogeochemical and isotopic of Hudai geothermal field and its vicinity, Sandikli-Afyonkarahisar, Turkey. TUBITAK report project no. CAYDAG-110Y034