@article{DAN_1997_354_4_a2,
     author = {V. I. Zubov},
     title = {Conservative numerical methods for the integration of differential},
     journal = {Doklady Akademii Nauk},
     pages = {446--448},
     publisher = {mathdoc},
     volume = {354},
     number = {4},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_4_a2/}
}