TY - JOUR A1 - Bagderina, Yulia Yu. A1 - Tarkhanov, Nikolai Nikolaevich T1 - Differential invariants of a class of Lagrangian systems with two degrees of freedom T2 - Journal of mathematical analysis and applications KW - Equivalence KW - Differential invariant KW - Euler-Lagrange equations Y1 - 2014 UR - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/38052 SN - 0022-247X SN - 1096-0813 VL - 410 IS - 2 SP - 733 EP - 749 PB - Elsevier CY - San Diego ER -