Authors: Bertotti, ML Bolotin, SV

Citation: Ml. Bertotti et Sv. Bolotin, On the influence of the kinetic energy on the stability of equilibria of natural Lagrangian systems, ARCH R MECH, 152(1), 2000, pp. 65-79

Authors: Alessio, F Bertotti, ML Montecchiari, P

Citation: F. Alessio et al., Multibump solutions to possibly degenerate equilibria for almost periodic Lagrangian systems, Z ANG MATH, 50(6), 1999, pp. 860-891