Grossman, A. D., Zhou, Y. N., Gross, C., Heilig, J., Christie, G. E., & Calendar, R. (1985). Mutations in the rpoH (htpR) gene of Escherichia coli K-12 phenotypically suppress a temperature-sensitive mutant defective in the sigma 70 subunit of RNA polymerase.

Grossman, A D., Y N. Zhou, C. Gross, J. Heilig, G E. Christie, và R. Calendar. Mutations in the RpoH (htpR) Gene of Escherichia Coli K-12 Phenotypically Suppress a Temperature-sensitive Mutant Defective in the Sigma 70 Subunit of RNA Polymerase. 1985.

Grossman, A D., et al. Mutations in the RpoH (htpR) Gene of Escherichia Coli K-12 Phenotypically Suppress a Temperature-sensitive Mutant Defective in the Sigma 70 Subunit of RNA Polymerase. 1985.