On quasi-components Lelek, A. — 1967 General Topology and its Relations to Modern Analysis and Algebra
On fixations of sets in Euclidean spaces Lelek, A. — 1962 General Topology and its Relations to Modern Analysis and Algebra
On the surjective span and semispan of connected metric spaces A. Lelek — 1977 Colloquium Mathematicae
Dimension inequalities for unions and mappings of separable metric spaces A. Lelek — 1971 Colloquium Mathematicae
On the dimension of quasi-components in peripherically compact spaces A. Lelek — 1962 Colloquium Mathematicae