@article{1183744688,
author = {Knight, Julia F.},
title = {Requirement Systems},
journal = {J. Symbolic Logic},
volume = {60},
number = {1},
year = {1995},
pages = { 222-245},
language = {en},
url = {http://dml.mathdoc.fr/item/1183744688}
}
Knight, Julia F. Requirement Systems. J. Symbolic Logic, Tome 60 (1995) no. 1, pp. 222-245. http://gdmltest.u-ga.fr/item/1183744688/