{{cite journal | last1=Zhao | first1=Y. | author2=£ | author3=Y. Feng | author4=£ | author5=P. Sun | author6=B. Wang | author7=J. Qiao | author8=W. Duan | author9=J. Zhang | author10=H. Zhou | author11=C. Yang | year=2020 | title=RESPONSES OF PHYTOHORMONES, CARBON AND NITROGEN STATUS TO THE TRUNK-EXTENSION PRUNING IN THREE-YEAR-OLD PAULOWNIA PLANTATION | journal=Journal of Animal and Plant Sciences | volume=31 | issue=2 | pages=450-458 | doi=10.36899/JAPS.2021.2.0234 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AG-19-0122}}