1. High-Polymer Pectins and Their Deesterification
2. S.A. Black, 1970 . Preparation, grading and gelling characteristics of low-methoxyl pectins , p.57 . M.S. thesis . University of Georgia, Athens, GA.
3. THE EFFECT OF DEMETHYLATION PROCEDURES ON THE QUALITY OF LOW-ESTER PECTINS USED IN DESSERT GELS
4. J.J. Doesburg, 1965 . Pectic substances in fresh and preserved fruits and vegetables . Inst. for Research on Storage and Processing of Horticultural Produce, I.B.V.T. Communication No. 25, Wageningen, The Netherlands.