Vainavičienė, Jadvyga. “Corresponding Directions Line Surfaces of Line Hypercomplex in Multidimensional Affine Space ”. Lietuvos matematikos rinkinys 38, no. II (December 14, 1998): 187–190 . Accessed December 5, 2025. https://www.journals.vu.lt/LMR/article/view/37814.