@article{walker_girgis_klaenhammer_1999, title={The groESL chaperone operon of Lactobacillus johnsonii}, volume={65}, number={7}, journal={Applied and Environmental Microbiology}, author={Walker, D. C. and Girgis, H. S. and Klaenhammer, T. R.}, year={1999}, pages={3033–3041} }
 @article{walker_klaenhammer_1994, title={Isolation of a novel IS3 group insertion element and construction of an integration vector for Lactobacillus spp}, volume={176}, number={17}, journal={Journal of Bacteriology}, author={Walker, D. C. and Klaenhammer, T. R.}, year={1994}, pages={5330} }