@article{IIMI_2012_39_1_a21,
     author = {E. S. Zhukovskii and E. A. Pluzhnikova},
     title = {On a periodic boundary value problem for an implicit differential equation},
     journal = {Izvestiya Instituta Matematiki i Informatiki Udmurtskogo Gosudarstvennogo Universiteta},
     pages = {52--53},
     publisher = {mathdoc},
     volume = {39},
     number = {1},
     year = {2012},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IIMI_2012_39_1_a21/}
}