@article{1183742240,
author = {Ben-David, Shai and Magidor, Menachem},
title = {The Weak $\square^\ast$ is Really Weaker than the Full $\square$},
journal = {J. Symbolic Logic},
volume = {51},
number = {1},
year = {1986},
pages = { 1029-1033},
language = {en},
url = {http://dml.mathdoc.fr/item/1183742240}
}
Ben-David, Shai; Magidor, Menachem. The Weak $\square^\ast$ is Really Weaker than the Full $\square$. J. Symbolic Logic, Tome 51 (1986) no. 1, pp. 1029-1033. http://gdmltest.u-ga.fr/item/1183742240/