@article{1093882535,
author = {Johnson, Frederick A.},
title = {Copi's method of deduction.},
journal = {Notre Dame J. Formal Logic},
volume = {20},
number = {1},
year = {1979},
pages = { 295-300},
language = {en},
url = {http://dml.mathdoc.fr/item/1093882535}
}
Johnson, Frederick A. Copi's method of deduction.. Notre Dame J. Formal Logic, Tome 20 (1979) no. 1, pp. 295-300. http://gdmltest.u-ga.fr/item/1093882535/