@article{PMF_1905_16_1_a2,
     author = {Guldberg, Alf},
     title = {Ueber lineare homogene {Differenzengleichungen} derselben {Art}},
     journal = {Prace Matematyczno-Fizyczne},
     pages = {35--43},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1905},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/PMF_1905_16_1_a2/}
}