@article{05188492,
title = {The fundamental group and Galois coverings of hexagonal systems in 3-space.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {2006},
year = {2006},
doi = {10.1155/IJMMS/2006/47381},
zbl = {1146.05045},
language = {en},
url = {http://dml.mathdoc.fr/item/05188492}
}
De La Peña, J.A.; Mendoza, L. The fundamental group and Galois coverings of hexagonal systems in 3-space.. International Journal of Mathematics and Mathematical Sciences, Tome 2006 (2006) . doi : 10.1155/IJMMS/2006/47381. http://gdmltest.u-ga.fr/item/05188492/