BelousovK. I., NazarovaL. A., RoiterA. V., & SergeychukV. V. (1995). Elementary and multielementary representations of vectroids. Ukrains’kyi Matematychnyi Zhurnal, 47(11), 1451–1477. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/5537