KÖPPL-TURYNA, Monika; KÖPPL, Stefan. REAL OPTIONS FOR AGRICULTURAL INVESTMENTS. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 14, n. 1, p. 253–264, 2013. Disponível em: https://qme.sggw.edu.pl/article/view/3594. Acesso em: 3 kwi. 2025.