pH Research
In sickness and in health – what does the oral microbiome mean to us? An ecological perspective; Advanced in Dental Research 2018, Vol 29(I) 60-65; Marsh, P D
Dental Plaque as a Biofilm: The Significance of pH in Health and Caries; Compendium March 2009, Vol 30, Number 2, 76-87; Philip D. Marsh, BSc PhD