%0 Journal Article %A Z. Stojek %T The proof of the uniqueness of the solution of a mixed problem for a class of partial differential equations of even order %J Annales Polonici Mathematici %D 1963 %P 279-283 %V 13 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-13-3-279-283/ %R 10.4064/ap-13-3-279-283 %G en %F 10_4064_ap_13_3_279_283