1. Pectinase stabilization of orange juice cloud
2. P. A. M. Heemskerk, 1971 . Schimmel pectine-esterase . M. Sc. thesis , Agricultural University, Dept. Food Science, Wageningen, The Netherlands.
3. Pectin Methyl Esterases of the Banana. Purification and Properties
4. T. J. Kew, and M. K. Veldhuis, 1961 . Cloud stabilization in citrus juice. United States Patent 2,995, 448 .