@article{MZ_1988__199_1_173987,
     author = {Lucas J\'odar},
     title = {Explicit {Solutions} of {Two-Point} {Boundary} {Value} {Operator} {Problems.}},
     journal = {Mathematische Zeitschrift},
     pages = {555--564},
     publisher = {mathdoc},
     volume = {199},
     number = {1},
     year = {1988},
     zbl = {0638.34012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1988__199_1_173987/}
}