@article{FORUM_1990__2_3_141641,
     author = {G\"unter F. Steinke},
     title = {Semiclassical 4-dimensional {Laguerre} {Planes.}},
     journal = {Forum mathematicum},
     pages = {233--248},
     publisher = {mathdoc},
     volume = {2},
     number = {3},
     year = {1990},
     zbl = {0696.51008},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1990__2_3_141641/}
}