Geodesic
Quasi-endomorphism rings of some quasi-decomposable
Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 5, pp. 159-176

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We obtain a description of quasi-endomorphism rings of torsion-free Abelian groups $G$ of rank $4$, quasi-decomposable into a direct sum of groups $A_1$ and $A_2$ of rank $1$ and a strongly indecomposable group $B$ of rank $2$ in the case where the quasi-homomorphism group $\mathbb {Q} \otimes \operatorname{Hom}(A_2,B)$ has rank $2$. 
@article{FPM_2019_22_5_a16,
     author = {A. V. Cherednikova},
     title = {Quasi-endomorphism rings of some quasi-decomposable},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {159--176},
     publisher = {mathdoc},
     volume = {22},
     number = {5},
     year = {2019},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2019_22_5_a16/}
}
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A. V. Cherednikova. Quasi-endomorphism rings of some quasi-decomposable. Fundamentalʹnaâ i prikladnaâ matematika, Tome 22 (2019) no. 5, pp. 159-176. http://geodesic.mathdoc.fr/item/FPM_2019_22_5_a16/