{{cite journal | last1=Le | first1=V. N. | author2=Q. T. Nguyen | author3=N. T. Nguyen | author4=T. Janda | author5=G. Szalai | author6=T. D. Nguyen | author7=T. G. Le | year=2021 | title=FOLIAGE APLLIED GIBBERELIC ACID INFLUENCES GROWTH, NUTRIENT CONTENTS AND QUALITY OF LETTUCES (LACTUCA SATIVA L.) | journal=Journal of Animal and Plant Sciences | volume=31 | issue=6 | pages=1720-1727 | doi=10.36899/JAPS.2021.6.0374 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=AG-20-0161}}