[1] L. BICAN P. JAMBOR T. KEPKA P. NĚMEC:
Stable and costable preradicals. Acta Univ. Carolinae, Math. et Phys. 16 (1975), 63-69.
MR 0387333
[2] L. BICAN P. JAMBOR T. KEPKA P. NĚMEC:
Centrally splitting preradicals. Comment. Math. Univ. Carоlinae 17 (1976), 31-47.
MR 0414610
[3] L. BICAN P. JAMBOR T. KEPKA P. NĚMEC:
Hereditary and cohereditary preradicals. (to appear in Czech. Math. J.).
MR 0414611
[4] S. SHELAH:
Infinite abelian groups, Whitehead problem and some constructions. Israel J. Math. 18 (1974), 243-256.
MR 0357114 |
Zbl 0318.02053