C. McGaughey & E. C. Stowell, “The Adsorption of Human Salivary Proteins and Porcine Submaxillary Mucin by Hydroxyapatite”, Archives of Oral Biology 12, № 7 (1967): 815–28; Won-Kyu Park et al., “Influences of Animal Mucins on Lysozyme Activity in Solution and on Hydroxyapatite Surface”, Archives of Oral Biology 51, № 10 (2006): 861–69.