Nenovsky N., Tochkov, K. and K. Tochkov (2012).«University efficiency and public funding for higher education in Bulgaria », Post-Communist Economies, 24 (4): 515–532.
Lucrări de cercetare și de alții, Lucrărilor Nenovsky N., Tochkov, K. and K. Tochkov (2012).«University efficiency and public funding for higher education in Bulgaria », Post-Communist Economies, 24 (4): 515-532.