Jaśkiewicz W, Jaśkiewicz-Bauman A. About practical exercises taken from real life. Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2003 May 27 [cited 2026 Oct. 30];3:87-93. Available from: https://studmath.uken.krakow.pl/article/view/13472