Hajnal, A.; Voigt, Bernd; Lehel, Jenö; Gavalec, Martin; Recski, András; Galvin, Fred: Problems.
(English).
In:
Frolík, Zdeněk (ed.): Abstracta. 9th Winter School on Abstract Analysis.
Czechoslovak Academy of Sciences, Praha, 1981.
pp. 195-202
Gavalec, Martin: Products of ideals of Borel sets.
(English).
In:
Frolík, Zdeněk (ed.): Abstracta. 9th Winter School on Abstract Analysis.
Czechoslovak Academy of Sciences, Praha, 1981.
pp. 32-33
