Geodesic
Finite groups with a 2-Sylow subgroup containing a self-centralizing elementary Abelian subgroup of order 8
Matematičeskie zametki, Tome 16 (1974) no. 6, pp. 899-906 
V. M. Sitnikov. Finite groups with a 2-Sylow subgroup containing a self-centralizing elementary Abelian subgroup of order 8. Matematičeskie zametki, Tome 16 (1974) no. 6, pp. 899-906. http://geodesic.mathdoc.fr/item/MZM_1974_16_6_a5/
@article{MZM_1974_16_6_a5,
     author = {V. M. Sitnikov},
     title = {Finite groups with {a~2-Sylow} subgroup containing a~self-centralizing elementary {Abelian} subgroup of order 8},
     journal = {Matemati\v{c}eskie zametki},
     pages = {899--906},
     year = {1974},
     volume = {16},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_1974_16_6_a5/}
}
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Voir la notice de l'article provenant de la source Math-Net.Ru

It is proved that a finite 2-group containing a self-centralizing elementary Abelian subgroup of order 8 has sectional rank le4.