TY - JOUR T1 - A general existence theorem for boundary value problems for ordinary differential equations JF - Nonlinear Anal. 15 (1990), no. 10, 897--914 Y1 - 1990 A1 - Giovanni Vidossich PB - SISSA Library UR - http://hdl.handle.net/1963/632 U1 - 3821 U2 - Mathematics U3 - Functional Analysis and Applications ER -