1.
Kopka J, Feissner G. Fibonacci sequence II (helping students become active learners through guided mathematical investigations). Ann. Univ. Paedagog. Crac. Stud. Math. [Internet]. 2003 May 27 [cited 2026 Oct. 30];3:107-12. Available from: https://studmath.uken.krakow.pl/article/view/13475