Let $G$ be a quasi-complete p-group and let $A$ be a subgroup of $G$ such that there exists a direct summand $L$ of $G$ containing $A$ which is minimal among the direct summands of $G$ that contain $A$. Such a direct summand $L$ is said to be a minimal direct summand of $G$ containing $A$. We prove that all minimal direct summands of G containing $A$ are isomorphic.
"On isomorphism of minimal direct summands." Hokkaido Math. J. 23 (2) 229 - 240, June 1994. https://doi.org/10.14492/hokmj/1381412691