L. M. Lotrean, M. Popa, E. A. Santillan, și M. Florea, „Methodological Challenges in Research Regarding the Lifestyle of School Children”, rcis, vol. 44, pp. 321–331, mar. 2014, Data accesării: nov. 06, 2026. Disponibil la: https://www.rcis.ro/journal/article/view/1535-methodological-challenges-in-research-regarding-the