SHEKHAR, H. Design of Funnel Port Tubular Propellant Grain for Neutral Burning Profile in Rockets. Defence Science Journal, [S. l.], v. 59, n. 5, p. 494–498, 2009. DOI: 10.14429/dsj.59.1550. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/1550. Acesso em: 15 jun. 2025.