Hammad, K. S. M., T. Hefzalrahman, M. K. S. Morsi, N. F. S. Morsy, and E. A. AbdEl-Salam,
"Optimization of ultrasound- and enzymatic-assisted extractions of polyphenols from dried red onion peels and evaluation of their antioxidant activities",
Preparative Biochemistry & Biotechnology, vol. 54, issue 2, pp. 247–259, 2024.