Geodesic
Upper bounds on homological dimensions of pullback rings. II
Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 7, Tome 272 (2000), pp. 234-237 Cet article a éte moissonné depuis la source Math-Net.Ru

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New upper bounds on the finitistic dimensions of pullbacks are given and homological dimensions of certain pullbacks are calculated. 
@article{ZNSL_2000_272_a12,
     author = {N. V. Kosmatov},
     title = {Upper bounds on homological dimensions of pullback {rings.~II}},
     journal = {Zapiski Nauchnykh Seminarov POMI},
     pages = {234--237},
     year = {2000},
     volume = {272},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZNSL_2000_272_a12/}
}
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N. V. Kosmatov. Upper bounds on homological dimensions of pullback rings. II. Zapiski Nauchnykh Seminarov POMI, Problems in the theory of representations of algebras and groups. Part 7, Tome 272 (2000), pp. 234-237. http://geodesic.mathdoc.fr/item/ZNSL_2000_272_a12/