@article{RSMUP_1954__23__333_0,
     author = {Hornich, Hans},
     title = {Das {Problem} der linearen {Differentialoperatoren}},
     journal = {Rendiconti del Seminario Matematico della Universit\`a di Padova},
     pages = {333--339},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {23},
     year = {1954},
     mrnumber = {65765},
     zbl = {0056.31603},
     language = {de},
     url = {http://www.numdam.org/item/RSMUP_1954__23__333_0/}
}