@article{MZ_1970__117_171419,
     author = {Trevor O. Hawkes},
     title = {On {Fitting} {Formations.}},
     journal = {Mathematische Zeitschrift},
     pages = {177--182},
     publisher = {mathdoc},
     volume = {117},
     year = {1970},
     zbl = {0195.03803},
     url = {http://geodesic.mathdoc.fr/item/MZ_1970__117_171419/}
}