@article{LI Ling-qiang:78, author = {LI Ling-qiang, LI Qing-guo}, title = {The characterizations of lattice-valued fuzzy lower approximation operators by a unique axiom}, publisher = {JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE)}, year = {2014}, journal = {JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE)}, volume = {49}, number = {10}, eid = {78}, numpages = {4}, pages = {78}, keywords = {lattice-valued fuzzy relations;lattice-valued fuzzy rough sets;out products;axioms}, url = {http://lxbwk.njournal.sdu.edu.cn/EN/abstract/article_624.shtml}, doi = {10.6040/j.issn.1671-9352.0.2014.105} }