9ISABEL M,HELENAP.The variation of chemical composition andpulping yield with age and growth factors in youngEucalyptusglobulus. Wood and Fiber Science . 2002
10F. G Kong,J. CH. Chen,G H. Yang et. al.P-RC APMP Pulping of the Triploid of Populus Tomentosa. The International Papermaking & Environment Conference . 2004