Mir ili i︠a︡drena katastrofa?Ruben Avramov, Toncho Trendafilov, Nansen Bekhar · First published 1984Open the Tome
"Sledindustrialna era," ili, Krŭstopŭt na protivorechii͡a︡taNansen Bekhar · First published 1983Open the Tome
Leninovata teorii︠a︡ za imperializma i sŭvremennii︠a︡t kapitalisŭmLi︠u︡ben A. Georgiev, Nansen Bekhar, Li͡uben A. Georgiev, Bŭlgarska akademii︠a︡ na naukite. Ikonomicheski otdel · First published 1970Open the Tome
