TY - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) A1 - CAO Xue-jing, LUO Zhi-xue T1 - Optimal control of forest evolution system in polluted environment Y1 - 2018-07-20 JF - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) JO - JOURNAL OF SHANDONG UNIVERSITY(NATURAL SCIENCE) SP - 15 EP - 20 VL - 53 IS - 7 UR - http://lxbwk.njournal.sdu.edu.cn N1 - 10.6040/j.issn.1671-9352.0.2017.578 ER -