@article{IVM_1997_11_a0,
     author = {M. V. Bulatov},
     title = {A~perturbation method for differential-algebraic systems},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--9},
     year = {1997},
     number = {11},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1997_11_a0/}
}