Information System for Educational Software: State- of-the-Art and Perspektives for its Development in Bulgaria. - R. Tsankova; R. Koleva (ISI, 1991)

Linking Environmental Studies and IT - a East-West Project in Bulgaria, Germany and the United Kingdom. - U. Bosler; D. Squires; R. Tsankova; W. Ziebarth (IFIP Congress (2), 1992)