1. State of the Art for Landslides Along the North Bulgarian Black Sea Coast, Landslide Science and Practice, Volume 5: Complex Environment;Berov,2013
2. The landslides in Bulgaria – factors and distribution;Bruchev;Geologica Balcanica,2007
3. Geozastita – Varna Ltd. (2018). Annual Report under Contract No PД,-02-29-198 / 02.05.2018 and Additional Agreement № PД,-02-29-198 (1) / 06.11.2018 Preventive activities related to registration and monitoring of the landslide areas on the territory of the Republic of Bulgaria and the areas with abrasive processes along the Black Sea coast in the regions of Dobrich, Shumen, Varna, Burgas (in Bulgarian).
4. Landslides along the Northern Back Sea coast between Varna city and Kavarna town (Bulgaria);Evstatiev,2013
5. Landslides near Topola village (Northern Black Sea coast);Evlogiev;Eng. Geol. and Hydrogeol,2013