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- [2] ABOUT DE-ESTERIFICATION OF APPLE PECTIN BY ACID LEBENSMITTEL INDUSTRIE, 1977, 24 (09): : 403 - 405
- [5] LOW ESTER PECTIN FROM APPLE POMACE INDUSTRIAL AND ENGINEERING CHEMISTRY, 1946, 38 (11): : 1153 - 1156
- [10] The esterification of pectin substances, IV announcement - The investigation of the constitution of pectin-ester. BERICHTE DER DEUTSCHEN CHEMISCHEN GESELLSCHAFT, 1937, 70 : 1611 - 1617