Geodesic
On mixed~LCA groups with commutative rings of continuous endomorphisms
Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2007), pp. 73-90.

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Let $\mathcal L$ be the class of locally compact abelian (LCA) groups. For $X\in\mathcal L$, let $E(X)$ denote the ring of continuous endomorphisms of $X$. In this paper, we determine for certain subclasses$\mathcal S$ of $\mathcal L$ the groups $X\in\mathcal S$ such that $E(X)$ is commutative. The main results concern the case of mixed LCA groups. 
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Valeriu Popa. On mixed~LCA groups with commutative rings of continuous endomorphisms. Buletinul Academiei de Ştiinţe a Republicii Moldova. Matematica, no. 3 (2007), pp. 73-90. http://geodesic.mathdoc.fr/item/BASM_2007_3_a6/

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