@article{1181071658,
author = {Spiegel, Eugene},
title = {A Note on Pi Incidence Algebras},
journal = {Rocky Mountain J. Math.},
volume = {29},
number = {4},
year = {1999},
pages = { 685-690},
language = {en},
url = {http://dml.mathdoc.fr/item/1181071658}
}
Spiegel, Eugene. A Note on Pi Incidence Algebras. Rocky Mountain J. Math., Tome 29 (1999) no. 4, pp. 685-690. http://gdmltest.u-ga.fr/item/1181071658/