@article{01416095,
title = {Clinic obstructions and clinic cohomological groups.},
journal = {Portugaliae Mathematica. Nova S\'erie},
volume = {56},
year = {1999},
pages = {381-387},
zbl = {0978.20024},
language = {en},
url = {http://dml.mathdoc.fr/item/01416095}
}
Phan, T.; Natividade, M. Clinic obstructions and clinic cohomological groups.. Portugaliae Mathematica. Nova Série, Tome 56 (1999) pp. 381-387. http://gdmltest.u-ga.fr/item/01416095/