@article{10_14708_ma_v24i38_1835,
     author = {M. Ptak and A. Rutkowska and A. Sowa},
     title = {On the inverse of two variables power series},
     journal = {Mathematica Applicanda},
     pages = { 81--86},
     publisher = {mathdoc},
     volume = {24},
     number = {38},
     year = {1995},
     doi = {10.14708/ma.v24i38.1835},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v24i38.1835/}
}