Mémoire sur le spiral réglant des chronomètres et des montres.
Existentially Closed Locally Finite Central Extensions: Multipliers and Local Systems.
On absolutely simple locally finite groups
Joins of Subnormal Subgroups are Serial.
Groups with Restricted Non-Normal Subgroups.
On factor coverings of groups
On multipliers of Heineken-Mohamed type groups
On minimal conditions related to Miller-Moreno type groups
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