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- [4] DETERMINATION AND CHARACTERIZATION OF PECTIC SUBSTANCES IN TOBACCO DOKLADI NA BOLGARSKATA AKADEMIYA NA NAUKITE, 1978, 31 (11): : 1425 - 1427
- [5] ON THE DETERMINATION OF ACETYL GROUPS IN PECTIC SUBSTANCES FOOD RESEARCH, 1954, 19 (06): : 627 - 632
- [7] AUTOMATED-METHOD FOR THE DETERMINATION OF PECTIC SUBSTANCES LEBENSMITTEL-WISSENSCHAFT & TECHNOLOGIE, 1979, 12 (05): : 247 - 251