OLBRYŚ, J. Orthogonalized factors in market-timing models of Polish equity funds. Metody Ilościowe w Badaniach Ekonomicznych, [S. l.], v. 11, n. 1, p. 128–138, 2010. Disponível em: https://qme.sggw.edu.pl/article/view/3055. Acesso em: 21 lis. 2024.