%0 Journal Article %A Curry, Haskell B. %T The equivalence of two definitions of elementary formal system %J Compositio Mathematica %D 1968 %P 13-20 %V 20 %I Wolters-Noordhoff Publishing %U http://www.numdam.org/item/CM_1968__20__13_0/ %G en %F CM_1968__20__13_0