Taylor, Hall, Enquist, and Silhavy. (1981) 1981. “Identification of OmpR: A Positive Regulatory Protein Controlling Expression of the Major Outer Membrane Matrix Porin Proteins of Escherichia Coli K-12”. J Bacteriol 147 (1): 255-8. doi:10.1128/jb.147.1.255-258.1981.