@article{05257092, title = {Cordial deficiency.}, journal = {Bulletin of the Malaysian Mathematical Sciences Society. Second Series}, volume = {30}, year = {2007}, pages = {201-204}, zbl = {1140.05324}, language = {en}, url = {http://dml.mathdoc.fr/item/05257092} }
Riskin, Adrian. Cordial deficiency.. Bulletin of the Malaysian Mathematical Sciences Society. Second Series, Tome 30 (2007) pp. 201-204. http://gdmltest.u-ga.fr/item/05257092/