@article{GDZPPN002487616, title = {The Elation Group of a 4-DImensional Laguerre Plane.}, journal = {Monatshefte f\"ur Mathematik}, volume = {112}, year = {1991}, pages = {207-232}, zbl = {0746.51008}, url = {http://dml.mathdoc.fr/item/GDZPPN002487616} }
Steinke, Günter F. The Elation Group of a 4-DImensional Laguerre Plane.. Monatshefte für Mathematik, Tome 112 (1991) pp. 207-232. http://gdmltest.u-ga.fr/item/GDZPPN002487616/