1. Oral bacteriology ecology;Gibbons,1978
2. Periodontal diseases;Pihlstrom;Lancet,2005
3. Oral diseases: a global public health challenge;Peres;Lancet,2019
4. Factors predisposing to oropharyngeal colonization with gram-negative bacilli in the aged;William;N Engl J Med,1978
5. Microbial flora of the oral cavity;Hardie,1983