@article{RLIN_1997_9_8_2_a0,
     author = {Bertotti, Maria Letizia and Bolotin, Sergey V.},
     title = {Doubly asymptotic trajectories of {Lagrangian} systems and a problem by {Kirchhoff}},
     journal = {Atti della Accademia nazionale dei Lincei. Rendiconti Lincei. Matematica e applicazioni},
     pages = {93--100},
     publisher = {mathdoc},
     volume = {Ser. 9, 8},
     number = {2},
     year = {1997},
     zbl = {0892.70012},
     mrnumber = {923953},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RLIN_1997_9_8_2_a0/}
}