@article{02099502, title = {Bounds for the homological dimensions of pullbacks.}, journal = {Zapiski Nauchnykh Seminarov POMI}, volume = {265}, year = {2002}, pages = {222-228}, zbl = {1052.16006}, language = {en}, url = {http://dml.mathdoc.fr/item/02099502} }
Kosmatov, N.V. Bounds for the homological dimensions of pullbacks.. Zapiski Nauchnykh Seminarov POMI, Tome 265 (2002) pp. 222-228. http://gdmltest.u-ga.fr/item/02099502/