@article{MAN_1982__260_163659,
     author = {Wilhelm Singhof},
     title = {Parallelizability of {Homogeneous} {Spaces.} {I.}},
     journal = {Mathematische Annalen},
     pages = {101--116},
     publisher = {mathdoc},
     volume = {260},
     year = {1982},
     zbl = {0471.57005},
     url = {http://geodesic.mathdoc.fr/item/MAN_1982__260_163659/}
}