Fernández Chapou, J. L., 		de la Portilla Maldonado, L. C., 		Vargas, C. A., 		Granados Samaniego, J., AND 		Velázquez Arcos, J. M..
"Circular, Elliptical and Parabolic Properties in Missile Shutting" <em>Revista Cubana de Física</em> [Online], Volume 27 Number 2 (5 August 2010)