Enax, J., Janus, A. M., Raabe, D., Epple, M., & Fabritius, H.-O. (2014). Ultrastructural organization and micromechanical properties of shark tooth enameloid. Acta Biomaterialia, 10(9), 3959-3968. doi:10.1016/j.actbio.2014.04.028.