Levy, Carl C.; Weinstein, Gerald D. (1964). "The Metabolism of Coumarin by a Microorganism. II. The Reduction of o-Coumaric Acid to Melilotic Acid". Biochemistry3 (12): 1944–7. doi:10.1021/bi00900a027. பப்மெட்:14269315.
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Levy, Carl C.; Weinstein, Gerald D. (1964). "The Metabolism of Coumarin by a Microorganism. II. The Reduction of o-Coumaric Acid to Melilotic Acid". Biochemistry3 (12): 1944–7. doi:10.1021/bi00900a027. பப்மெட்:14269315.