@article{1093637771,
author = {Humberstone, I. L.},
title = {Operational semantics for positive ${\rm R}$.},
journal = {Notre Dame J. Formal Logic},
volume = {28},
number = {1},
year = {1987},
pages = { 61-80},
language = {en},
url = {http://dml.mathdoc.fr/item/1093637771}
}
Humberstone, I. L. Operational semantics for positive ${\rm R}$.. Notre Dame J. Formal Logic, Tome 28 (1987) no. 1, pp. 61-80. http://gdmltest.u-ga.fr/item/1093637771/