Citation: P. Habets et Pj. Torres, Some multiplicity results for periodic solutions of a Rayleigh differential equation, DYN CONT A, 8(3), 2001, pp. 335-351
Citation: Pj. Torres, Necessary and sufficient conditions for existence of periodic motions of forced systems of particles, Z ANG MATH, 52(3), 2001, pp. 535-540
Citation: Pj. Torres, Existence and uniqueness of elliptic periodic solutions of the Brillouin electron beam focusing system, MATH METH A, 23(13), 2000, pp. 1139-1143
Citation: J. Campos et Pj. Torres, On the structure of the set of bounded solutions on a periodic lienard equation, P AM MATH S, 127(5), 1999, pp. 1453-1462