@article{article36f1e7ab,
title   = {Strain variation in ppGpp concentration and RpoS levels in laboratory strains of Escherichia coli K-12},
author = {Spira, Beny and Hu, Xuye and Ferenci, Thomas},
year = {2008},
doi = {10.1099/mic.0.2008/018457-0},
journal   = {Microbiology}
}