1. R. Baer, Linear Algebra and Projective Geometry, Academic Press, New York, 1952.
2. K. Faltings, On the automorphism group of a reduced primary abelian group, Trans. Amer. Math. Soc. 165 (1972), 1–25.
3. K. Faltings, Primäre abelsche Gruppen mit Semidualität, Arch. Math. 26 (1975), 14–19.
4. L. Fuchs, Infinite Abelian Groups, Volume I, Academic Press, New York, 1970.
5. L. Fuchs, Infinite Abelian Groups, Volume II, Academic Press, New York, 1973.