@article{1183744040, author = {Dyckhoff, Roy}, title = {Contraction-Free Sequent Calculi for Intuitionistic Logic}, journal = {J. Symbolic Logic}, volume = {57}, number = {1}, year = {1992}, pages = { 795-807}, language = {en}, url = {http://dml.mathdoc.fr/item/1183744040} }
Dyckhoff, Roy. Contraction-Free Sequent Calculi for Intuitionistic Logic. J. Symbolic Logic, Tome 57 (1992) no. 1, pp. 795-807. http://gdmltest.u-ga.fr/item/1183744040/