Liu, S. T., Lee, L. Y., Tai, C. Y., Hung, C. H., Chang, Y. S., Wolfram, J. H., . . . Goldstein, A. H. (1992). Cloning of an Erwinia herbicola gene necessary for gluconic acid production and enhanced mineral phosphate solubilization in Escherichia coli HB101: Nucleotide sequence and probable involvement in biosynthesis of the coenzyme pyrroloquinoline quinone.

Liu, S T., L Y. Lee, C Y. Tai, C H. Hung, Y S. Chang, J H. Wolfram, R. Rogers, und A H. Goldstein. Cloning of an Erwinia Herbicola Gene Necessary for Gluconic Acid Production and Enhanced Mineral Phosphate Solubilization in Escherichia Coli HB101: Nucleotide Sequence and Probable Involvement in Biosynthesis of the Coenzyme Pyrroloquinoline Quinone. 1992.

Liu, S T., et al. Cloning of an Erwinia Herbicola Gene Necessary for Gluconic Acid Production and Enhanced Mineral Phosphate Solubilization in Escherichia Coli HB101: Nucleotide Sequence and Probable Involvement in Biosynthesis of the Coenzyme Pyrroloquinoline Quinone. 1992.