WYDERKA, Zdzisław. About monotonic and oscillatory solutions of scalar linear differential equations with measures as coefficients. Annales Mathematicae Silesianae, [S. l.], v. 5, p. 68–74, 1991. Disponível em: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14283. Acesso em: 7 may. 2025.