Khachatryan, Gegham. “The Concept of Low-Cost Airlines As a Way of Increasing the Economic Efficiency of Air Transport”. Bulletin of Yerevan University G: Economics 9, no. 3 (27) (December 14, 2018): 49–61. Accessed September 19, 2024. https://pub.ysu.am/index.php/bulletin-ysu-economics/article/view/vol_9_no_3_2018_pp049-061.