Ranguelov, Boyko. The Erzincan 1939 Earthquake(PDF). Second Balkan Geophysical Conference and Exhibition. [26 December 2012]. (原始内容存档(PDF)于2013-10-05).
Ranguelov, Boyko. The Erzincan 1939 Earthquake(PDF). Second Balkan Geophysical Conference and Exhibition. [26 December 2012]. (原始内容存档(PDF)于2013-10-05).