@article{105362, author = {Jaroslav Je\v zek}, title = {The existence of upper semicomplements in lattices of primitive classes}, journal = {Commentationes Mathematicae Universitatis Carolinae}, volume = {012}, year = {1971}, pages = {519-532}, zbl = {0225.08006}, mrnumber = {0292734}, language = {en}, url = {http://dml.mathdoc.fr/item/105362} }
Ježek, Jaroslav. The existence of upper semicomplements in lattices of primitive classes. Commentationes Mathematicae Universitatis Carolinae, Tome 012 (1971) pp. 519-532. http://gdmltest.u-ga.fr/item/105362/
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