@article{1183391408,
author = {Fitch, Frederic B.},
title = {A Minimum Calculus for Logic},
journal = {J. Symbolic Logic},
volume = {9},
number = {1},
year = {1944},
pages = { 89-94},
language = {en},
url = {http://dml.mathdoc.fr/item/1183391408}
}
Fitch, Frederic B. A Minimum Calculus for Logic. J. Symbolic Logic, Tome 9 (1944) no. 1, pp. 89-94. http://gdmltest.u-ga.fr/item/1183391408/