@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/