Bingham, N. H. ., and A. J. . Ostaszewski. “The Steinhaus-Weil Property: II. The Simmons-Mospan Converse”. Sarajevo Journal of Mathematics, vol. 16, no. 2, Mar. 2022, pp. 179-86, https://sjm.anubih.ba/index.php/sjm/article/view/24.