@article{ARM_1975__11_2_a0,
     author = {Barv{\'\i}nek, Erich},
     title = {An abstract model of linear differential transformations},
     journal = {Archivum mathematicum},
     pages = {67--77},
     publisher = {mathdoc},
     volume = {11},
     number = {2},
     year = {1975},
     mrnumber = {0407381},
     zbl = {0373.34003},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ARM_1975__11_2_a0/}
}