On tightness in chain-net spaces Ignacio Jané, Paul R. Meyer, Petr Simon, Richard Gordon Wilson (1981) Commentationes Mathematicae Universitatis Carolinae
On topological ergodic measure spaces. S.P. Chakraborty, M. Dutta (1977) Publications de l'Institut Mathématique [Elektronische Ressource]
On θ -generalized closed sets. Dontchev, Julian, Maki, Haruo (1999) International Journal of Mathematics and Mathematical Sciences
Oб одной задаче Э. Чеха Viacheslav I. Malykhin (1976) Commentationes Mathematicae Universitatis Carolinae