%0 Journal Article %A Barták, Jaroslav %A Vejvoda, Otto %T Periodic solutions to linear partial differential equations of the first order %J Czechoslovak Mathematical Journal %D 1991 %P 185-202 %V 41 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1991.102452/ %R 10.21136/CMJ.1991.102452 %G en %F 10_21136_CMJ_1991_102452