On periodic solutions to Lagrangian system with singularities and constraints
O. Zubelevich

This publication is cited in the following articles:

1. A. A. Kulzhumiyeva, “Reduction of a Linear $\boldsymbol{D_{e}}$-System to a Canonical Form in the Case of Equivalence to a $\boldsymbol{D_{e}}$-System of Higher Order Linear Equations”, Lobachevskii J Math, 44:3 (2023), 1171