Michailov, D., Marinov, D., Smolenov, P., Müller, B., & Papasova, K. (1980). Bulgarien kleiner Reiseführer (o.A.). Sofia-Press.
Lua i Stíl Chicago (17ú heag.)Michailov, Dimiter, Dimo Marinov, Pantscho Smolenov, Barbara Müller, agus Käthe Papasova. Bulgarien Kleiner Reiseführer. o.A. Sofia: Sofia-Press, 1980.
Lua MLA (8ú heag.)Michailov, Dimiter, et al. Bulgarien Kleiner Reiseführer. o.A. Sofia-Press, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.