{{cite journal | last1=Mahmood | first1=S. | author2=M. G. Shahid | author3=M. Nadeem | author4=R. Nelofer | author5=M. Irfan | year=2022 | title=APPLICATION OF STATISTICAL DESIGN FOR THE ECONOMICAL PRODUCTION OF PHYTASE BY ASPERGILLUS NIGER USING SOLID STATE FERMENTATION | journal=Journal of Animal and Plant Sciences | volume=32 | issue=1 | pages=238-246 | doi=10.36899/JAPS.2022.1.0419 | issn=1018-7081 | eissn=2309-8694 | publisher=Pakistan Agricultural Scientists Forum | url=https://thejaps.org.pk/AbstractView.aspx?mid=Bioch-20-0018}}