@article{10_14708_ma_v1i1_298,
     author = {Roman Zuber},
     title = {Variables reduction methods},
     journal = {Mathematica Applicanda},
     pages = { 69--84},
     publisher = {mathdoc},
     volume = {1},
     number = {1},
     year = {1973},
     doi = {10.14708/ma.v1i1.298},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/ma.v1i1.298/}
}