@article{1077491234,
author = {Ward, Morgan},
title = {The algebra of lattice functions},
journal = {Duke Math. J.},
volume = {5},
number = {1},
year = {1939},
pages = { 357-371},
language = {en},
url = {http://dml.mathdoc.fr/item/1077491234}
}
Ward, Morgan. The algebra of lattice functions. Duke Math. J., Tome 5 (1939) no. 1, pp. 357-371. http://gdmltest.u-ga.fr/item/1077491234/