TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - T1 - Interval algorithm for mixed integer nonlinear two-level programming problems Y1 - 2018-02-20 JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 9 EP - 17 VL - 53 IS - 2 UR - http://lxbwk.njournal.sdu.edu.cn N1 - 10.6040/j.issn.1671-9352.0.2017.135 ER -