Djanette, Blizak, Chafiqi Fouad, and Kendil. Djamel. “WHAT THINKS THE UNIVERSITY’S STUDENTS ABOUT PROPAGATION OF LIGHT IN THE VACUUM?”. European Scientific Journal, ESJ 9, no. 24 (August 31, 2013). Accessed April 24, 2024. https://eujournal.org/index.php/esj/article/view/1705.