Ext in pre-Abelian categories.
Richman, Fred ; Walker, Elbert A.
Pacific J. Math., Tome 73 (1977) no. 2, p. 521-535 / Harvested from Project Euclid
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Publié le : 1977-05-14
Classification:  18E05 
@article{1102811444,
     author = {Richman, Fred and Walker, Elbert A.},
     title = {Ext in pre-Abelian categories.},
     journal = {Pacific J. Math.},
     volume = {73},
     number = {2},
     year = {1977},
     pages = { 521-535},
     language = {en},
     url = {http://dml.mathdoc.fr/item/1102811444}
}

Richman, Fred; Walker, Elbert A. Ext in pre-Abelian categories.. Pacific J. Math., Tome 73 (1977) no. 2, pp.  521-535. http://gdmltest.u-ga.fr/item/1102811444/