@article{DAN_1997_354_5_a7,
     author = {A. B. Morgulis},
     title = {Global regularity of unsteady flows with piecewise-continuous},
     journal = {Doklady Akademii Nauk},
     pages = {607--609},
     publisher = {mathdoc},
     volume = {354},
     number = {5},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1997_354_5_a7/}
}