Stepakhno , V. I. “Sets of Independent Vectors in Spaces of Unlimitedly Growing Dimensionality ”. Ukrains’kyi Matematychnyi Zhurnal 44, no. 5 (May 26, 1992): 691-696. Accessed June 2, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7966.