Kierat, W. and Sztaba, U. (1996) “Differential equations of the second order with measures as coefficients”, Annales Mathematicae Silesianae, 10, pp. 79–86. Available at: https://trrest.vot.pl/ojsus/index.php/AMSIL/article/view/14194 (Accessed: 6 May 2025).