Multibump solutions for a class of lagrangian systems slowly oscillating at infinity Francesca Alessio, Piero Montecchiari (1999) Annales de l'I.H.P. Analyse non linéaire
Multiple closed orbits for singular conservative systems via geodesic theory Ugo Bessi (1991) Rendiconti del Seminario Matematico della Università di Padova
Multiple homoclinic orbits for a class of conservative systems Antonio Ambrosetti, Vittorio Coti Zelati (1993) Rendiconti del Seminario Matematico della Università di Padova
Multiple orbits for hamiltonian systems on starshaped surfaces with symmetries Mario Girardi (1984) Annales de l'I.H.P. Analyse non linéaire
Multiple solutions for a class of p ( x ) -Laplacian systems. Fu, Yongqiang, Zhang, Xia (2009) Journal of Inequalities and Applications [electronic only]
Multiplicity of Subharmonic solutions of Forces Hamiltonian systems near an equilibrium. Maria Letizia Bertotti (1989) Manuscripta mathematica