Lotrean, Lucia Maria, Monica Popa, Edna Arrilo Santillan, and Mira Florea. 2014. “Methodological Challenges in Research Regarding the Lifestyle of School Children”. Revista de Cercetare Si Interventie Sociala 44 (March): 321-31. https://www.rcis.ro/journal/article/view/1535-methodological-challenges-in-research-regarding-the.