Bulgarische Akademie der Wissenschaften, Zentralstelle für wissenschaftliche Information und Dokumentation = Bulletin d'analyses de la littérature scientifique bulgare. Histoire, archéologie et ethnographie / Académie bulgare des sciences, Centre d'information et de documentation scientifique
edited by Commission of the European Communities, Directorate-General Telecommunications, Information Industries, and Innovation in collaboration with Directorate-General Employment, Social Affairs and Education, Directorate-General Science, Research, and Development [and] Directorate-General Energy