@article{IVM_2021_10_a2,
     author = {N. B. Medvedeva},
     title = {Approximate calculation of the coefficients of the {Dulac} series},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {37--50},
     publisher = {mathdoc},
     number = {10},
     year = {2021},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_10_a2/}
}