Tachev, M.T. и др. 2018. Principle of work in the process of digitization and reconstruction of model of belt buckle by photogrammetry and 3D computer design. ЕЖЕГОДНЫЙ ЖУРНАЛ ТЕХНИЧЕСКОГО УНИВЕРСИТЕТА ВАРНЫ, БОЛГАРИЯ. 2, 2 (дек. 2018), 54–61. DOI:https://doi.org/10.29114/ajtuv.vol2.iss2.93.