1. Ambraseys N (2009) Earthquakes in the Mediterranean and middle east: a multidisciplinary study of seismicity up to 1900. Cambridge University Press, Cambridge
2. Angelova D (2001) Tectonics and relief of the Pernik depression (Bulgaria). Geol Balc 31(1–2):85–86
3. Attaliotae M (1853) Historia: opus a Wladimiro Bruneto de Presle, instituti gallici socio, inventum descriptum correctum, Corpus scriptorum historiae Buzantinae, vol 44. Impensis Weberi, Bonn
4. Batandjiev I, Matova M, Stoyanov S (1966) The Pernik earthquake (1965) and certain tectonic problems. Bull Geol Inst (Bulg Acad Sci) 15:313–333
5. Beregov R (1939) On the tertiary geology in Pernik. Geol Balc 3(2):46–54