Martí-López, L., 		Darias-González, J. G., 		Ramos de Campos, J. A., AND 		Ramírez-Miquet, Evelio E..
"Einstein and the Hypothesis of Single Photon Energy Interaction" <em>Revista Cubana de Física</em> [Online], Volume 31 Number 1 (15 July 2014)