@article{PORMA_1990__47_1_115704,
     author = {Brison, Owen J.},
     title = {The {Fitting} class generated by the $\pi $-perfect groups},
     journal = {Portugaliae mathematica},
     pages = {99--102},
     publisher = {mathdoc},
     volume = {47},
     number = {1},
     year = {1990},
     mrnumber = {1079510},
     zbl = {0716.20016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1990__47_1_115704/}
}