@article{MZ_1981__176_183640,
     author = {Heinz M\"uller},
     title = {Decomposition {Theorems} for {Group} {Pairs.}},
     journal = {Mathematische Zeitschrift},
     pages = {223--246},
     publisher = {mathdoc},
     volume = {176},
     year = {1981},
     zbl = {0459.20045},
     url = {http://geodesic.mathdoc.fr/item/MZ_1981__176_183640/}
}