@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/