Popa, Nicoleta Laura, and Liliana Stan. “Investigating Learning Space With Photography in Early Childhood Education: A Participatory Research Approach”. Revista de Cercetare Si Interventie Sociala, vol. 42, Sept. 2013, pp. 248-61, https://www.rcis.ro/journal/article/view/1114-investigating-learning-space-with-photography-in-early.