The $m$-extension of a topology is defined, some of its properties are studied, and its relation to a simple extension is noted. Also, an associated closure operation on the lattice of all topologies on a fixed set is studied.
"Extensions of Topologies." Missouri J. Math. Sci. 2 (2) 62 - 69, Spring 1990. https://doi.org/10.35834/1990/0202062