@article{GDZPPN002033585, title = {Zur Linearit\"at 2-dimensionaler Raum-Zeit-Transformationen.}, journal = {Aequationes mathematicae}, volume = {22}, year = {1981}, pages = {266-276}, zbl = {0533.51003}, url = {http://dml.mathdoc.fr/item/GDZPPN002033585} }
Stettler, Raymond. Zur Linearität 2-dimensionaler Raum-Zeit-Transformationen.. Aequationes mathematicae, Tome 22 (1981) pp. 266-276. http://gdmltest.u-ga.fr/item/GDZPPN002033585/