Błaszczyk, A.: On a factorization lemma and a construction of absolute without separation axioms.
(English).
In:
Novák, Josef (ed.): General topology and its relations to modern analysis and algebra IV, Proceedings of the fourth Prague topological symposium, 1976.
Part B: Contributed Papers.
Society of Czechoslovak Mathematicians and Physicist, Praha, 1977.
pp. [45]-50
