@article{GDZPPN002283174, title = {Self-Dual Primitives for Modal Logic.}, journal = {Mathematische Annalen}, volume = {125}, year = {1952}, pages = {284-286}, zbl = {0053.19902}, url = {http://dml.mathdoc.fr/item/GDZPPN002283174} }
Rose, A. Self-Dual Primitives for Modal Logic.. Mathematische Annalen, Tome 125 (1952) pp. 284-286. http://gdmltest.u-ga.fr/item/GDZPPN002283174/