@article{PM_1989_1989_1_a3,
     author = {J\'odar S\'anchez, Lucas},
     title = {Soluciones explicitas para problemas no homog\'eneos de operadores de {Sturm-Liouville.}},
     journal = {Publicacions matem\`atiques},
     pages = {47-57},
     year = {1989},
     volume = {33},
     number = {1},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PM_1989_1989_1_a3/}
}