@article{ZNSL_1979_84_a1,
     author = {O. I. Bogoyavlenskii and S. P. Novikov},
     title = {Finite-dimensional oscillatory models in the general relativity theory and in gas dynamics},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {7--15},
     publisher = {mathdoc},
     volume = {84},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_1979_84_a1/}
}