Zhelyazkova, D. The Low Cost Airline Carriers as an Alternative on The Bulgarian Transport Market for Passenger Transportation. Zline: Univerzita Tomase Bati, 2010 9 p. (диск), 978-80-7318-922-8.
Zhelyazkova, D. The Low Cost Airline Carriers as an Alternative on The Bulgarian Transport Market for Passenger Transportation. Zline: Univerzita Tomase Bati, 2010 9 p. (диск), 978-80-7318-922-8.
Zhelyazkova, D. (2010) The Low Cost Airline Carriers as an Alternative on The Bulgarian Transport Market for Passenger Transportation, Zline: Univerzita Tomase Bati 9 p. (диск), 978-80-7318-922-8.
Zhelyazkova, D. (2010). The Low Cost Airline Carriers as an Alternative on The Bulgarian Transport Market for Passenger Transportation. Zline: Univerzita Tomase Bati, 9 p. (диск).
Zhelyazkova D. The Low Cost Airline Carriers as an Alternative on The Bulgarian Transport Market for Passenger Transportation. Zline: Univerzita Tomase Bati; 2010. p. 9 p. (диск). ISBN: 978-80-7318-922-8.
