Glukhov В.И. and Varepo Л.Г. 2023. Unified reference system for geometric characteristics dimensional elements of details. Part I. The theory of two dimensions maximum and minimum. Omsk Scientific Bulletin. 3(187) (Sep. 2023), 116–124. DOI:https://doi.org/10.25206/1813-8225-2023-187-116-124.