@article{GDZPPN00234873X,
title = {Boolean Operations on Graphs.},
journal = {Mathematica Scandinavica},
volume = {20},
year = {1967},
pages = {41-51},
zbl = {0152.22801},
url = {http://dml.mathdoc.fr/item/GDZPPN00234873X}
}
Harary, Frank; Wilcox, Gordon W. Boolean Operations on Graphs.. Mathematica Scandinavica, Tome 20 (1967) pp. 41-51. http://gdmltest.u-ga.fr/item/GDZPPN00234873X/