{{cite journal | last1=Wu | first1=Q. S. | author2=Y. N. Zou | author3=Y. H. Peng | author4=C. Y. Liu | year=2011 | title=ROOT MORPHOLOGICAL MODIFICATION OF MYCORRHIZAL CITRUS (CITRUS TANGERINE) SEEDLINGSAFTER APPLICATION WITH EXOGENOUS POLYAMINES | journal=Journal of Animal and Plant Sciences | volume=21 | issue=1 | pages=20-25 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=2011-JAPS-118}}