L. M. Lotrean, M. Popa, E. A. Santillan, et M. Florea, « Methodological Challenges in Research Regarding the Lifestyle of School Children », rcis, vol. 44, p. 321–331, mars 2014, Consulté le: nov. 06, 2026. Disponible sur: https://www.rcis.ro/journal/article/view/1535-methodological-challenges-in-research-regarding-the