%0 Journal Article %A Mařík, Jan %T Integrating factor %J Mathematica Bohemica %D 1994 %P 225-229 %V 119 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/MB.1994.126164/ %R 10.21136/MB.1994.126164 %G en %F 10_21136_MB_1994_126164