{{cite journal | last1=Jin | first1=C. J. Yang，M. | author2=Y. Q. Zhang，Y. B. Duan | year=2023 | title=Bioinformatics and Expression Analysis of PAL Gene Family of Poplar Plant under Different Nitrogen Treatments | journal=Journal of Animal and Plant Sciences | volume=33 | issue=5 | pages=1393-1203 | doi=10.36899/JAPS.2023.5.0712 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=Biot-21-0111}}