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Schirrmeister, Jörg F; Seger, Richard K; Altenburger, Markus J; Lussi, Adrian; Hellwig, Elmar (2007). Effects of various forms of calcium added to chewing gum on initial enamel carious lesions in situ. Caries research, 41(2), pp. 108-114. Basel: Karger 10.1159/000098043
