@article{01310564,
title = {A N. Bourbaki type general theory and the properties of contracting symbols and corresponding contracted forms.},
journal = {Georgian Mathematical Journal},
volume = {6},
year = {1999},
pages = {179-190},
doi = {10.1023/A:1022128817224},
zbl = {0929.03017},
language = {en},
url = {http://dml.mathdoc.fr/item/01310564}
}
Pkhakadze, Sh. A N. Bourbaki type general theory and the properties of contracting symbols and corresponding contracted forms.. Georgian Mathematical Journal, Tome 6 (1999) pp. 179-190. doi : 10.1023/A:1022128817224. http://gdmltest.u-ga.fr/item/01310564/