//-->
The goal of economic growth
Phelps, Edmund S., (1969)
Behavioral and ecological economics
Katona, George, (1968)
Upravlenie, modelirane, prognozirane : Stefanov, Nikola [Kostadinov], Niko Jachiel, Stefan Kačaunov
Stefanov, Nikola Kostadinov, (1970)