@article{1183738757,
author = {Barendregt, Henk},
title = {A Characterization of Terms of the $|lambda I$-Calculus Having a Normal Form},
journal = {J. Symbolic Logic},
volume = {38},
number = {1},
year = {1973},
pages = { 441-445},
language = {en},
url = {http://dml.mathdoc.fr/item/1183738757}
}
Barendregt, Henk. A Characterization of Terms of the $|lambda I$-Calculus Having a Normal Form. J. Symbolic Logic, Tome 38 (1973) no. 1, pp. 441-445. http://gdmltest.u-ga.fr/item/1183738757/