Bican, Ladislav:
$QF-3'$ modules and rings.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 14
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issue 2,
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Bican, Ladislav:
A remark on $n$-torsion-free modules.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 14
(1973),
issue 2,
pp. 223-229