Sur le groupe des unités de $ZD_4$ (French)
Commutativity conditions for semi-prime rings
Maximum term function of entire Dirichlet series
On the analysis of the cosets of $\Gamma=E\colon\!{\rm GL}_n(p),\ p$, p prime.
On the conjugacy classes of $p^2\colon\!{\rm GL}_2(p)$-$p$ odd prime''
A note on absolute σ-summability
On the character table of the wreath product $2.G Wr C_2$
An extremal problem for univalent functions
Eine Weiterführung der Variations- und Funktionalrechnung. (German)