1. On increasing sequences of topologies on a set;Bose;Riv. Mat. Univ. Parma,2007
2. A countable connected Hausdorff space;Brown;Bull. Am. Math. Soc.,1953
3. On the infinitude of primes;Furstenberg;Am. Math. Mon.,1955
4. A connected topology for the integers;Golomb;Am. Math. Mon.,1959
5. General Topology;Kelley,1975