@article{1093958148,
author = {Goddard, Leonard},
title = {An augmented modal logic.},
journal = {Notre Dame J. Formal Logic},
volume = {6},
number = {1},
year = {1965},
pages = { 81-98},
language = {en},
url = {http://dml.mathdoc.fr/item/1093958148}
}
Goddard, Leonard. An augmented modal logic.. Notre Dame J. Formal Logic, Tome 6 (1965) no. 1, pp. 81-98. http://gdmltest.u-ga.fr/item/1093958148/