%0 Journal Article %A Roman Zuber %T Variables reduction methods %J Mathematica Applicanda %D 1973 %P 69-84 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.14708/ma.v1i1.298/ %R 10.14708/ma.v1i1.298 %G pl %F 10_14708_ma_v1i1_298