@article{1183734008,
author = {Cohen, L. Jonathan},
title = {A Formalisation of Referentially Opaque Contexts},
journal = {J. Symbolic Logic},
volume = {25},
number = {1},
year = {1960},
pages = { 193-202},
language = {en},
url = {http://dml.mathdoc.fr/item/1183734008}
}
Cohen, L. Jonathan. A Formalisation of Referentially Opaque Contexts. J. Symbolic Logic, Tome 25 (1960) no. 1, pp. 193-202. http://gdmltest.u-ga.fr/item/1183734008/