Ordinal invariants in topology - summary Kannan, V. — 1977 General topology and its relations to modern analysis and algebra IV
On rigidity and groups of homeomorphisms Kannan, V.; Rajagopalan, M. — 1972 General Topology and its Relations to Modern Analysis and Algebra
Ordinal invariants in topology II. Sequential order of compactifications V. Kannan — 1979 Compositio Mathematica