@article{1183731098,
author = {Lorenzen, Paul},
title = {Algebraische und Logistische Untersuchungen Uber Freie Verbande},
journal = {J. Symbolic Logic},
volume = {16},
number = {1},
year = {1951},
pages = { 81-106},
language = {en},
url = {http://dml.mathdoc.fr/item/1183731098}
}
Lorenzen, Paul. Algebraische und Logistische Untersuchungen Uber Freie Verbande. J. Symbolic Logic, Tome 16 (1951) no. 1, pp. 81-106. http://gdmltest.u-ga.fr/item/1183731098/