VOUTSINOS, C. Teaching Optics: Light Sources and Shadows. JOURNAL OF ADVANCES IN PHYSICS, [S. l.], v. 2, n. 2, p. 134–138, 2013. DOI: 10.24297/jap.v2i2.2100. Disponível em: https://rajpub.com/index.php/jap/article/view/498. Acesso em: 11 apr. 2025.