Geodesic
On solvable groups whose Sylow subgroups are either abelian or extraspecial
Trudy Instituta matematiki, Tome 20 (2012) no. 2, pp. 3-9.

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A $p$-group $G$ is called extraspecial if its derived subgroup, center and Frattini subgroup are groups of order $p.$ We consider the solvable groups whose Sylow subgroups are either abelian or extraspecial. It is proved that derived length is at most $2\cdot|\pi(G)|$ and nilpotent length is at most $2+|\pi(G)|$. 
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D. V. Gritsuk; V. S. Monakhov. On solvable groups whose Sylow subgroups are either abelian or extraspecial. Trudy Instituta matematiki, Tome 20 (2012) no. 2, pp. 3-9. http://geodesic.mathdoc.fr/item/TIMB_2012_20_2_a0/

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