SINHA, S. K.; CHAUDHURI, B. B.; DAS, P. Study of the reaction of guanidine-nitrate from urea and ammonium nitrate using silica gel as catalyst. Defence Science Journal, [S. l.], v. 13, n. 1, p. 104–108, 2014. DOI: 10.14429/dsj.13.7079. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/7079. Acesso em: 6 jul. 2025.