# « Bulgaria in Balkan History between the Two World Wars », Pervi Mejdunaroden Kongres po Bulgaristika Dokladi (First International Conference on Bulgarian Studies), Sofia, Bulgarian Academy of the Sciences, 1982.
# « Bulgaria in Balkan History between the Two World Wars » , Pervi Mejdunaroden Kongres po Bulgaristika Dokladi (First International Conference on Bulgarian Studies), Sofia, Bulgarian Academy of the Sciences, 1982.