@article{MAT_1969_13_2_a2,
     author = {Ph. Hall and G. Higman},
     title = {On the $p$-length of $p$-soluble groups and reduction theorems for {Burnside's} problem},
     journal = {Matematika},
     pages = {64--104},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MAT_1969_13_2_a2/}
}