GRILLO, Aurelio F. THE MASS COMPOSITION OF ULTRA HIGH ENERGY COSMIC RAYS. Acta Polytechnica, Prague, Czech Republic, v. 53, n. A, p. 698–702, 2013. DOI: 10.14311/AP.2013.53.0698. Disponível em: https://ojs.cvut.cz/ojs/index.php/ap/article/view/1951. Acesso em: 12 dec. 2024.