{{cite journal | last1=Zafarullah | first1=A. | author2=S. Naz | author3=F. Osman | year=2021 | title=COMPARISON OF A CONVENTIONAL PCR AND QUANTITATIVE REAL TIME PCR (qPCR) ASSAY FOR THE DETECTION OF HUANGLONGBING DISEASE ASSOCIATED WITH ‘CANDIDATUS LIBERIBACTER ASIATICUS’ IN CITRUS VARIETIES | journal=Journal of Animal and Plant Sciences | volume=31 | issue=5 | pages=1453-1460 | doi=10.36899/JAPS.2021.5.0346 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=Biot-19-0007}}