Hancock V. Ray. (1964). Commutative Schreier semigroup extensions of a group.
Chicago Style (17th ed.) CitationHancock V. Ray. Commutative Schreier Semigroup Extensions of a Group. 1964.
MLA idézésHancock V. Ray. Commutative Schreier Semigroup Extensions of a Group. 1964.
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