@article{2185,
author = {Halld\'en, S.},
title = {A reduction of the primitive symbols of the Lewis calculi},
journal = {Portugaliae mathematica},
volume = {8},
year = {1949},
pages = {85-88},
zbl = {0037.29501},
mrnumber = {0038310},
language = {en},
url = {http://dml.mathdoc.fr/item/2185}
}
Halldén, S. A reduction of the primitive symbols of the Lewis calculi. Portugaliae mathematica, Tome 8 (1949) pp. 85-88. http://gdmltest.u-ga.fr/item/2185/