@misc{ELMA_1969__24_140943,
     title = {On {Hall's} {Third} {Definition} of {Group.}},
     journal = {Elemente der Mathematik},
     pages = {115--115},
     publisher = {mathdoc},
     volume = {24},
     year = {1969},
     zbl = {0214.27401},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1969__24_140943/}
}