Yamaguchi M, Otani Y, Li P, Nagao H, Lenggoro IW, Ishida A, Yazaki K, Nogucki K, Nakaba S, Yamane K, et al. Effects of long-term exposure to ammonium sulfate particles on growth and gas exchange rates of Fagus crenata, Castanopsis sieboldii, Larix kaempferi and Cryptomeria japonica seedlings. Atmospheric Environment. 2014 :1-8.