O množinách vzdialeností množín metrického priestoru Tibor Neubrunn, Tibor Šalát (1959) Matematicko-fyzikálny časopis
O riešení niektorých nerozhodnutelných topologických problémov William Wistar Comfort (1982) Pokroky matematiky, fyziky a astronomie
O бикoмпaктax, лeжaщиx в σ -пpoизвeдeнияx L. V. Nakhmanson, N. N. Yakovlev (1981) Commentationes Mathematicae Universitatis Carolinae
O компактификации пространств близости Khadzhiivanov, N. (1967) General Topology and its Relations to Modern Analysis and Algebra
Observations on a variant of compatibility. Jungck, G. (1998) International Journal of Mathematics and Mathematical Sciences
Observations on spaces with zeroset or regular G δ -diagonals Raushan Z. Buzyakova (2005) Commentationes Mathematicae Universitatis Carolinae We show that if X 2 has countable extent and X has a zeroset diagonal then X is submetrizable. We also make a couple of observations regarding spaces with a regular G δ -diagonal.