@article{RSMUP_1985__74__147_0,
     author = {Salvatore, A.},
     title = {Periodic solutions of asymptotically linear systems without symmetry},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {147--161},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {74},
     year = {1985},
     mrnumber = {818724},
     zbl = {0592.34030},
     language = {en},
     url = {http://www.numdam.org/item/RSMUP_1985__74__147_0/}
}