@article{1093634400,
author = {Purdy, William C.},
title = {A variable-free logic for mass terms.},
journal = {Notre Dame J. Formal Logic},
volume = {33},
number = {3},
year = {1992},
pages = { 348-358},
language = {en},
url = {http://dml.mathdoc.fr/item/1093634400}
}
Purdy, William C. A variable-free logic for mass terms.. Notre Dame J. Formal Logic, Tome 33 (1992) no. 3, pp. 348-358. http://gdmltest.u-ga.fr/item/1093634400/