{{cite journal | last1=Yang | first1=Xian-Song | author2=Guo-Xiang Chen | year=2015 | title=DIURNAL CHANGES IN GAS EXCHANGE AND CHLOROPHYLL FLUORESCENCE IN GINKGO LEAVES UNDER FIELD CONDITIONS | journal=Journal of Animal and Plant Sciences | volume=25 | issue=1 | pages=309-313 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2015-JAPS-44}}