Geodesic
Projective and generating modules over the ring of pseudorational numbers
Matematičeskie zametki, Tome 80 (2006) no. 3, pp. 437-448

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The projective, flat, and generating modules over the ring of pseudorational numbers are described. For the projective modules, a complete independent system of invariants is constructed.
Keywords: module over the ring of pseudorational numbers, pseudorational numbers, projective module, generating module, flat module. 
A. V. Tsarev. Projective and generating modules over the ring of pseudorational numbers. Matematičeskie zametki, Tome 80 (2006) no. 3, pp. 437-448. http://geodesic.mathdoc.fr/item/MZM_2006_80_3_a13/
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