TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - SUN Qian-qian, LI Xiao-nan T1 - Information measures of interval valued Pythagorean fuzzy sets and their applications Y1 - 2019-09-20 JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 43 EP - 53 VL - 54 IS - 9 UR - http://lxbwk.njournal.sdu.edu.cn N1 - 10.6040/j.issn.1671-9352.0.2019.038 ER -