TY  - JOUR
AU  - Bruns, Günter
TI  - Free Ortholattices
JO  - Canadian journal of mathematics
PY  - 1976
SP  - 977
EP  - 985
VL  - 28
IS  - 5
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-095-6/
DO  - 10.4153/CJM-1976-095-6
ID  - 10_4153_CJM_1976_095_6
ER  -