Geodesic
Finite co-Dedekindian groups
Glasgow mathematical journal, Tome 38 (1996) no. 2, pp. 163-169

Voir la notice de l'article provenant de la source Cambridge University Press

A group G is called Dedekindian if every subgroup ofG is normal in G.The structure of the finite Dedekindian groups is well-known [3, Satz 7.12]. They are either abelian or direct products of the form Q × A × B, where Q is the quaternion group of order 8, Ais abelian of odd order and exp(B) ≤ 2. 
Deaconescu, Marian; Silberberg, Gheorghe. Finite co-Dedekindian groups. Glasgow mathematical journal, Tome 38 (1996) no. 2, pp. 163-169. doi: 10.1017/S0017089500031396
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