Martini, D., et al. “Dentin Matrix Protein 1 and Dentin Sialophosphoprotein in Human Sound and Carious Teeth: An Immunohistochemical and Colorimetric Assay”. European Journal of Histochemistry, vol. 57, no. 4, Oct. 2013, p. e32, doi:10.4081/ejh.2013.e32.