Lynne Williams; Anthony Bryer (1997). "Survey in Trabzon and Gümüşhane Vilayets, Turkey, 1992-1994". Dumbarton Oaks Papers. 51. Cambridge: Harvard University Press: 283–289. doi:10.2307/1291767. JSTOR1291767.
jstor.org
Lynne Williams; Anthony Bryer (1997). "Survey in Trabzon and Gümüşhane Vilayets, Turkey, 1992-1994". Dumbarton Oaks Papers. 51. Cambridge: Harvard University Press: 283–289. doi:10.2307/1291767. JSTOR1291767.