Dzemyda, Gintautas, Jolita Bernatavičienė, Olga Kurasova, and Virginijus Marcinkevičius. 2004. “Strategies of Minimization of Sammon’s Mapping Error”. Lietuvos Matematikos Rinkinys 44 (spec.): 628–633. https://doi.org/10.15388/LMR.2004.32210.