@article {12417,
	title = {The role of the murMN operon in penicillin resistance and antibiotic tolerance of Streptococcus pneumoniae},
	journal = {Microb. Drug Resist},
	volume = {7},
	year = {2001},
	pages = {303-6},
	author = {S. R. Filipe and E. Severina and A. Tomasz}
}
