M. GHASEMI, K. ARZANI, A. YADOLLAHI, S. GHASEMI, and S. SARIKHANI KHORRAMI, “Estimate of Leaf Chlorophyll and Nitrogen Content in Asian Pear (Pyrus serotina Rehd.) by CCM-200”, Not Sci Biol, vol. 3, no. 1, pp. 91–94, Mar. 2011.