@article{CMH_1938__11_138713,
     author = {Arnold Emch},
     title = {\"Uber eine besondere {Klasse} von involutorischen {Cremona-Transformationen} und die darin invarianten algebraischen {Kurven.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {26--32},
     publisher = {mathdoc},
     volume = {11},
     year = {1938},
     zbl = {0019.32402},
     url = {http://geodesic.mathdoc.fr/item/CMH_1938__11_138713/}
}