@article{1183734847,
author = {Aqvist, Lennart},
title = {Results Concerning Some Modal Systems That Contain S2},
journal = {J. Symbolic Logic},
volume = {29},
number = {1},
year = {1964},
pages = { 79-87},
language = {en},
url = {http://dml.mathdoc.fr/item/1183734847}
}
Aqvist, Lennart. Results Concerning Some Modal Systems That Contain S2. J. Symbolic Logic, Tome 29 (1964) no. 1, pp. 79-87. http://gdmltest.u-ga.fr/item/1183734847/