TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - LIU Chun-hui T1 - Theory of interval valued (∈,∈∨ q)-fuzzy filters in BL-algebras Y1 - 2014-10-20 JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 83 EP - 89 VL - 49 IS - 10 UR - http://lxbwk.njournal.sdu.edu.cn N1 - 10.6040/j.issn.1671-9352.0.2013.648 ER -