Fredrick, K., Caramori, T., Chen, Y. F., Galizzi, A., & Helmann, J. D. (1995). Promoter architecture in the flagellar regulon of Bacillus subtilis: High-level expression of flagellin by the sigma D RNA polymerase requires an upstream promoter element. Proc Natl Acad Sci U S A.

Fredrick, K., T. Caramori, Y F. Chen, A. Galizzi, and J D. Helmann. "Promoter Architecture in the Flagellar Regulon of Bacillus Subtilis: High-level Expression of Flagellin By the Sigma D RNA Polymerase Requires an Upstream Promoter Element." Proc Natl Acad Sci U S A 1995.

Fredrick, K., et al. "Promoter Architecture in the Flagellar Regulon of Bacillus Subtilis: High-level Expression of Flagellin By the Sigma D RNA Polymerase Requires an Upstream Promoter Element." Proc Natl Acad Sci U S A 1995.