@article{1102968558, author = {Hong, Dang X.}, title = {Covering relations among lattice varieties.}, journal = {Pacific J. Math.}, volume = {43}, number = {3}, year = {1972}, pages = { 575-603}, language = {en}, url = {http://dml.mathdoc.fr/item/1102968558} }
Hong, Dang X. Covering relations among lattice varieties.. Pacific J. Math., Tome 43 (1972) no. 3, pp. 575-603. http://gdmltest.u-ga.fr/item/1102968558/