@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/