@article{MM2_1971__4_154038,
     author = {Hans Scheerer},
     title = {Transitive actions on {Hopf} homogeneous spaces.},
     journal = {Manuscripta mathematica},
     pages = {99--134},
     publisher = {mathdoc},
     volume = {4},
     year = {1971},
     zbl = {0212.28601},
     url = {http://geodesic.mathdoc.fr/item/MM2_1971__4_154038/}
}