Sej-Kolasa, M., & Sztemberg-Lewandowska, M. (2015). The Analysis of Changes over Time in the Number of Students Using Functional Principal Component Analysis in European Countries. Krakow Review of Economics and Management Zeszyty Naukowe Uniwersytetu Ekonomicznego W Krakowie, 916, 71-81. https://doi.org/10.15678/krem.740