Gedvila, Andrius, and Jonas Sidaravičius. “Investigation into the Accuracy of Colours Reproduced by the Ricoh Printer”. Mokslas – Lietuvos Ateitis Science – Future of Lithuania, vol. 4, no. 6, Feb. 2013, pp. 583-7, https://doi.org/10.3846/mla.2012.97.