@article{MZ_1966__93_170572,
     author = {Reinhard Mennicken and Alfred Sattler},
     title = {Biorthogonalentwicklungen analytischer {Funktionen} nach {Eigenl\"osungen} linearer {Differentialgleichungen.}},
     journal = {Mathematische Zeitschrift},
     pages = {1--36},
     publisher = {mathdoc},
     volume = {93},
     year = {1966},
     zbl = {0138.29403},
     url = {http://geodesic.mathdoc.fr/item/MZ_1966__93_170572/}
}