Christiansen, J. K., Hughes, J. E., Welker, D. L., Rodríguez, B. T., Steele, J. L., & Broadbent, J. R. (2008). Phenotypic and Genotypic Analysis of Amino Acid Auxotrophy in Lactobacillus helveticus CNRZ 32. American Society for Microbiology (ASM).

Christiansen, Jason K., Joanne E. Hughes, Dennis L. Welker, Beatriz T. Rodríguez, James L. Steele, and Jeff R. Broadbent. Phenotypic and Genotypic Analysis of Amino Acid Auxotrophy in Lactobacillus Helveticus CNRZ 32. American Society for Microbiology (ASM), 2008.

Christiansen, Jason K., et al. Phenotypic and Genotypic Analysis of Amino Acid Auxotrophy in Lactobacillus Helveticus CNRZ 32. American Society for Microbiology (ASM), 2008.