PIASECKI, K. IMPRECISE RETURN RATES ON THE WARSAW STOCK EXCHANGE. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 15, n. 1, p. 153–158, 2014. Disponível em: https://qme.sggw.edu.pl/article/view/3657. Acesso em: 21 lis. 2024.