Navickis, Kazimieras. “Geometry of Semi-Nonholonomic Hypercomplexes SNGr(1, 4, 5) in a Four-Dimensional Projective Space”. Lietuvos matematikos rinkinys 44, no. spec. (December 17, 2004): 198–201. Accessed December 4, 2025. https://www.zurnalai.vu.lt/LMR/article/view/31922.