@article{10_1017_S0017089505002922,
     author = {WEHRFRITZ, B. A. F.},
     title = {THE {DERIVED} {LENGTH} {OF} {A} {SOLUBLE} {SUBGROUP} {OF} {A} {FINITE-DIMENSIONAL} {DIVISION} {ALGEBRA}},
     journal = {Glasgow mathematical journal},
     pages = {119--124},
     year = {2006},
     volume = {48},
     number = {1},
     doi = {10.1017/S0017089505002922},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002922/}
}