@article{GDZPPN002237873,
title = {On the sectional irregularity of congruences.},
journal = {Manuscripta mathematica},
volume = {91},
year = {1996},
pages = {239-266},
zbl = {0898.14016},
url = {http://dml.mathdoc.fr/item/GDZPPN002237873}
}
Sols, Ignacio; Giraldo, Luis. On the sectional irregularity of congruences.. Manuscripta mathematica, Tome 91 (1996) pp. 239-266. http://gdmltest.u-ga.fr/item/GDZPPN002237873/