@article{GDZPPN002036630,
title = {A characterization of continuous associative operations whose graphs are ruled surfaces.},
journal = {Aequationes mathematicae},
volume = {33},
year = {1987},
pages = {114-119},
zbl = {0625.39008},
url = {http://dml.mathdoc.fr/item/GDZPPN002036630}
}
Alsina, C.; Sklar, A. A characterization of continuous associative operations whose graphs are ruled surfaces.. Aequationes mathematicae, Tome 33 (1987) pp. 114-119. http://gdmltest.u-ga.fr/item/GDZPPN002036630/