J. KOZMA, I. MAGYAR, P. MICHELBERGER, B. SÁLYI, and P. VÁRLAKI, “THE ESTABLISHMENT OF THE DEVELOPMENT STRATEGY OF THE HUNGARIAN BUS MANUFACTURE TO COPE WITH WORLD ECONOMY CHANGES”, Period. Polytech. Transp. Eng., vol. 10, no. 2, pp. 139–149, Jan. 1982.