Stefanov, S. (1995) “A Borsuk-Ulman type theorem for $\mathbb{Z}_{4}$-actions”, Ann. Sofia Univ. Fac. Math. and Inf, 87, pp. 279–286. Available at: https://ftl5.uni-sofia.bg/index.php/fmi/article/view/421 (Accessed: 23 November 2024).