@article{RSMUP_1990__83__19_0, author = {Mirenghi, Elvira and Tucci, Maria}, title = {Existence of $T$-periodic solutions for a class of lagrangian systems}, journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova}, volume = {84}, year = {1990}, pages = {19-32}, mrnumber = {1066425}, zbl = {0709.34034}, language = {en}, url = {http://dml.mathdoc.fr/item/RSMUP_1990__83__19_0} }
Mirenghi, Elvira; Tucci, Maria. Existence of $T$-periodic solutions for a class of lagrangian systems. Rendiconti del Seminario Matematico della Università di Padova, Tome 84 (1990) pp. 19-32. http://gdmltest.u-ga.fr/item/RSMUP_1990__83__19_0/
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