Strand Vidarsdottir, U., and P. O’Higgins. “Geometric Morphometrics and the Analysis of Variations in Facial Form: Robusticity of Biological Findings in Relation to Bilateral Versus Unilateral and Missing Landmarks”. Statistica, vol. 61, no. 2, Jan. 2001, pp. 315-33, doi:10.6092/issn.1973-2201/1181.