@article{MAN_1957__134_160598,
     author = {E. Thoma},
     title = {Die unit\"aren {Darstellungen} der universellen {\"Uberlagerungsgruppe} der {Bewegungsgruppe} des {R2} .},
     journal = {Mathematische Annalen},
     pages = {428--452},
     publisher = {mathdoc},
     volume = {134},
     year = {1957},
     zbl = {0080.32002},
     url = {http://geodesic.mathdoc.fr/item/MAN_1957__134_160598/}
}