@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/