@article {1989, title = {On the solvability of boundary value problems for higher order ordinary differential equations}, journal = {Nonlinear Anal. 13 (1989), no. 10, 1171-179}, number = {SISSA;35/88/M}, year = {1989}, publisher = {SISSA Library}, doi = {10.1016/0362-546X(89)90005-9}, url = {http://hdl.handle.net/1963/631}, author = {Giovanni Vidossich} }