%0 Journal Article %A Henryk Żołądek %T Two remarks about Picard-Vessiot extensions and elementary functions %J Colloquium Mathematicum %D 2000 %P 173-183 %V 84 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/cm-84/85-1-173-183/ %R 10.4064/cm-84/85-1-173-183 %G en %F 10_4064_cm_84_85_1_173_183