1. Alamdari, F., and S. Fagan. 2005. Impact of the adherence to the original low-cost model on the profitability of low-cost airlines. Transport Reviews 25 (3): 377-392. https://doi.org/10.1080/01441 640500038748.
2. Altman, E. I. (2013). Predicting financial distress of companies: Revisiting the Z-Score and ZETA® models. In Handbook of Research Methods and Applications in Empirical Finance (pp. 428-456). Edward Elgar Publishing. https://doi.org/10.4337/9780857936 097.00027
3. Altman, I. (1968). Altman Z-Score. FCS Commercial Finance Group. Baltagi, B.H., J.M. Grifn, and D.P. Rich. 1995. The measurement of from specific indexes of technical change. The Review of Economics and Statistics 77 (4): 654. https://doi.org/10.2307/2109813.
4. Belobaba, P.P. 2011. Did LCCs save airline revenue management? Journal of Revenue and Pricing Management 10 (1): 19-22. https ://doi.org/10.1057/rpm.2010.45.
5. Bieger, T., and A. Wittmer. 2006. Air transport and tourism: Perspectives and challenges for destinations, airlines and governments. Journal of Air Transport Management 12 (1): 40-46. https://doi. org/10.1016/j.jairtraman.2005.09.007.