MARTÍ-LÓPEZ, L. et al. Einstein and the Hypothesis of Single Photon Energy Interaction. Revista Cubana de Física, [S.l.], v. 31, n. 1, p. 5-9, july 2014. ISSN 2224-7939. Available at: <http://revistacubanadefisica.org/index.php/rcf/article/view/RCF_31-01_05_2014>. Date accessed: 06 may 2024.