Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{AM2_1971__7_136236, author = {S.P. AVANN}, title = {The {Lattice} of {Natural} {Orders} {(Short} {Communication)}}, journal = {Aequationes mathematicae}, pages = {117--117}, publisher = {mathdoc}, volume = {7}, year = {1971}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__7_136236/} }
S.P. AVANN. The Lattice of Natural Orders (Short Communication). Aequationes mathematicae, Tome 7 (1971), p. 117. http://geodesic.mathdoc.fr/item/AM2_1971__7_136236/