Lotrean, L. M., Popa, M., Santillan, E. A., & Florea, M. (2014). Methodological Challenges in Research Regarding the Lifestyle of School Children. Revista de Cercetare si Interventie Sociala, 44, 321-331. https://www.rcis.ro/journal/article/view/1535-methodological-challenges-in-research-regarding-the