Geodesic
${SR}$-groups of order $2^np^m$ with dihedral Sylow 2-subgroup
Modelirovanie i analiz informacionnyh sistem, Tome 14 (2007) no. 2, pp. 17-23 
V. V. Yanishevskii. ${SR}$-groups of order $2^np^m$ with dihedral Sylow 2-subgroup. Modelirovanie i analiz informacionnyh sistem, Tome 14 (2007) no. 2, pp. 17-23. http://geodesic.mathdoc.fr/item/MAIS_2007_14_2_a3/
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     title = {${SR}$-groups of order $2^np^m$ with dihedral {Sylow} 2-subgroup},
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Voir la notice de l'article provenant de la source Math-Net.Ru

The structure of ${SR}$-groups with dihedral Sylow $2$-subgroup modulo Frattini subgroup is described. It is proved that if a group $G$ is a non-supersolvable ${SR}$-group of order $2^np^m$ with dihedral Sylow $2$-subgroup, $p$ is Mersenne prime.

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