@article{MM2_1985__50_155055,
     author = {Andrei Duma and Wolfgang Radtke},
     title = {Automorphismen und {Modularraum} {Galoisscher} dreibl\"attriger {\"Uberlagerungen.}},
     journal = {Manuscripta mathematica},
     pages = {215--228},
     year = {1985},
     volume = {50},
     zbl = {0573.32020},
     url = {http://geodesic.mathdoc.fr/item/MM2_1985__50_155055/}
}