Sheng, Qianqian; Zhu, Zunling. Photosynthetic Capacity, Stomatal Behavior and Chloroplast Ultrastructure in Leaves of the Endangered Plant Carpinus putoensis W.C.Cheng during Gaseous NO2 Exposure and after Recovery. Forests. 2018-09-12, 9 (9): 561. doi:10.3390/f9090561.