@article{02174299,
title = {Existence theorems for commutative diagrams.},
journal = {Lobachevskii Journal of Mathematics},
volume = {17},
year = {2005},
pages = {211-228},
zbl = {1069.03040},
language = {en},
url = {http://dml.mathdoc.fr/item/02174299}
}
Rechnoi, V. Existence theorems for commutative diagrams.. Lobachevskii Journal of Mathematics, Tome 17 (2005) pp. 211-228. http://gdmltest.u-ga.fr/item/02174299/