@article{GDZPPN00225347X, title = {Ueber Covarianten ebener Collineationen.}, journal = {Mathematische Annalen}, volume = {40}, year = {1892}, pages = {89-98}, zbl = {24.0686.01}, url = {http://dml.mathdoc.fr/item/GDZPPN00225347X} }
Muth, P. Ueber Covarianten ebener Collineationen.. Mathematische Annalen, Tome 40 (1892) pp. 89-98. http://gdmltest.u-ga.fr/item/GDZPPN00225347X/