небо?ша ?оки?
Olivera Dumic, Nebojsa Djokic, Prvi let srpskog pilota na srpskom avionu, Vardarski zbornik br. 6, SANU Beograd 2006, 227 - 235; Olivera Dumic, Nebojsa Djokic, First flights of Sebia's pilots on serbia's plane, Recueil de Vardar no. 6, SANU Belgrade 2006, 227 - 235
https://www.academia.edu/52627..._2006_227_-_235