%0 Journal Article %A Dariusz Bielawski %A Tadeusz Pruszko %T On the structure of the set of solutions of a functional equation with applications to boundary value problems %J Annales Polonici Mathematici %D 1991 %P 201-209 %V 53 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-53-3-201-209/ %R 10.4064/ap-53-3-201-209 %G en %F 10_4064_ap_53_3_201_209