@article{MZ_1991__208_3_174327,
     author = {Michael Aschbacher and Peter B. Kleidman},
     title = {Exponents of almost simple groups and an application to the restricted {Burnside} problem.},
     journal = {Mathematische Zeitschrift},
     pages = {401--410},
     publisher = {mathdoc},
     volume = {208},
     number = {3},
     year = {1991},
     zbl = {0770.20017},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__208_3_174327/}
}