1. Audits, L. J.: Plant Growth Substances. I. Chemistry and Physiology. - Barnes and Noble Books, New York 1972.
2. Challice, J. S., Williams, A. H.: A comparative biochemical study of phenolase specifity inMalus, Pyrus and other plants. - Phytochemistry9: 1261–1269, 1970.
3. Chatterjee, A. K., Gibbins, L. N.: Metabolism of phloridzin byErwinia herbicola: Nature and degradation products and properties of phloridzin hydrolase. - J. Bacteriol.100: 594 to 600, 1969.
4. Grochowska, M. J.: Chromatographic) degradation of phloridzin. - Plant Physiol.41: 432 to 436, 1966.
5. Grochowska, M. J.: Occurrence of free phloretic acid (p-hydroxydihydrocinnamic acid) in xylem sap of the apple tree. - Bull. Acad. Polon. Sci. Ser. sci. biol.15: 455–459, 1967.