@article{1077309870,
author = {Valent, Richard},
title = {Basic intervals and related sublattices of the lattice of
topologies},
journal = {Duke Math. J.},
volume = {40},
number = {1},
year = {1973},
pages = { 487-492},
language = {en},
url = {http://dml.mathdoc.fr/item/1077309870}
}
Valent, Richard. Basic intervals and related sublattices of the lattice of
topologies. Duke Math. J., Tome 40 (1973) no. 1, pp. 487-492. http://gdmltest.u-ga.fr/item/1077309870/