1. Senior Researcher, Changgang Institute of Paper Science and Technology , Gangwon-do , Korea, Republic of
2. Department of Forest Science, Kookmin University, Jeongneung-ro, Seongbuk-gu , Seoul , Korea, Republic of
3. Department of Forest Science, Kookmin University, 77, Jeongneung-ro, Seongbuk-gu , Seoul , Korea, Republic of