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@article{MZ_1979__167_172842, author = {Rainer L\"owen}, title = {Classification of {4-Dimensional} {Symmetric} {Planes.}}, journal = {Mathematische Zeitschrift}, pages = {137--160}, publisher = {mathdoc}, volume = {167}, year = {1979}, zbl = {0403.51012}, url = {http://geodesic.mathdoc.fr/item/MZ_1979__167_172842/} }
Rainer Löwen. Classification of 4-Dimensional Symmetric Planes.. Mathematische Zeitschrift, Tome 167 (1979), pp. 137-160. http://geodesic.mathdoc.fr/item/MZ_1979__167_172842/