Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{CMUC_1973__14_2_a7, author = {Varlet, Jules C.}, title = {Nodal filters in semilattices}, journal = {Commentationes Mathematicae Universitatis Carolinae}, pages = {263--277}, publisher = {mathdoc}, volume = {14}, number = {2}, year = {1973}, mrnumber = {0327597}, zbl = {0276.06002}, language = {en}, url = {http://geodesic.mathdoc.fr/item/CMUC_1973__14_2_a7/} }
Varlet, Jules C. Nodal filters in semilattices. Commentationes Mathematicae Universitatis Carolinae, Tome 14 (1973) no. 2, pp. 263-277. http://geodesic.mathdoc.fr/item/CMUC_1973__14_2_a7/