{{cite journal | last1=Long | first1=Y. | author2=2 | author3=X.Yi | author4=W. Yang1 | year=2020 | title=PHOTOMETRY-BASED PREDICTION MODEL FOR THE CONTENT OF OLEANOLIC ACID IN PERIPLOCAFORRESTIISCHLTR | journal=Journal of Animal and Plant Sciences | volume=30 | issue=3 | pages=649-654 | doi=10.36899/JAPS.2020.3.0077 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AGECO-19-0013}}