@article{MAN_1941__118_160089,
     author = {H. Tietze},
     title = {\"Uber die {Anzahl} der {L\"osungen} gewisser {Aufgaben} \"uber {Gitterpunktfiguren}},
     journal = {Mathematische Annalen},
     pages = {290--298},
     publisher = {mathdoc},
     volume = {118},
     year = {1941},
     zbl = {0026.20401},
     url = {http://geodesic.mathdoc.fr/item/MAN_1941__118_160089/}
}