Photosynthetic characteristics of leaves and fruits of Hickory (Carya cathayensis Sarg.) and Pecan (Carya illinoensis K.Koch) during fruit development stages - Qinyi Xu; Jianfeng Wu; Yirun Cao; Xianyou Yang; Zhengjia Wang; Jianqin Huang; Guohua Xia; Qixiang Zhang; Yuanyuan Hu (Trees, 2016)