Madden, Dean (December 2000). "Enzymes in Fruit Juice Production"(PDF). National Center for Biotechnology Education. Archived(PDF) from the original on 2017-05-17. Retrieved 9 September 2017.
Madden, Dean (December 2000). "Enzymes in Fruit Juice Production"(PDF). National Center for Biotechnology Education. Archived(PDF) from the original on 2017-05-17. Retrieved 9 September 2017.