This publication is cited in the following 2 articles:
J.E. Marcos, “The maximum ring topology on the rational number field among those for which the sequence 1/n converges to zero”, Topology and its Applications, 128:2-3 (2003), 157
J.E. Marcos, “Lacunar ring topologies and maximum ring topologies with a prescribed convergent sequence”, Journal of Pure and Applied Algebra, 162:1 (2001), 53