Sej-Kolasa M, Sztemberg-Lewandowska M. The Analysis of Changes over Time in the Number of Students Using Functional Principal Component Analysis in European Countries. KREM [Internet]. 2015 Dec. 16 [cited 2024 Nov. 24];(916):71-8. Available from: https://krem.uek.krakow.pl/index.php/krem/article/view/740