Krivorov, Ignat: Strategicheski problemi pred bǔlgarskata armiya v Pǔrvata svetovna voyna (Strategic problems of the Bulgarian army in the First World War), in: : Pǔrvata svetovna voyna na Balkanite. Sbornik dokladi I nauchni sǔobshteniya, izneseni na mezhdunarodnata nauchna konferentsiya v Sofiya na 10.-11. oktomvri 2005 (The First World War on the Balkans. Collected papers from an international academic conference in Sofia 10.-11. October 2005), Sofia 2006, pp. 18-27.