1. K. Eda, “Almost slender groups and Fuchs-44-groups,” Comment. Math. Univ. St. Paul., 32, 131–135 (1983).
2. L. Fuchs, Infinite Abelian Groups, Vol. I, Academic Press, New York (1970).
3. L. Fuchs, Infinite Abelian Groups, Vol. II, Academic Press, New York (1973).
4. N. I. Kruchkov, “Abelian groups which are narrow with respect to a topology,” Fundam. Prikl. Mat., 2, No. 2, 615–617 (1996).
5. V. I. Kuzminov and I. Shvedov, “On completion of Abelian groups in P-topology,” Algebra Logika, 9, No. 4, 436–457 (1970).