%0 Journal Article %A D. Przeworska-Rolewicz %T On equations with several involutions of different orders and its applications to partial differential-difference equations %J Studia Mathematica %D 1969 %P 101-113 %V 32 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/sm-32-2-101-113/ %R 10.4064/sm-32-2-101-113 %G en %F 10_4064_sm_32_2_101_113