%0 Journal Article %A M. Cecchi %A M. Marini %A P. L. Zezza %T Boundary value problems on [a,b) and singular perturbations %J Annales Polonici Mathematici %D 1984 %P 73-80 %V 44 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/ap-44-1-73-80/ %R 10.4064/ap-44-1-73-80 %G en %F 10_4064_ap_44_1_73_80