Horák, Karel; Müller, Vladimír:
On the structure of commuting isometries.
(English).Commentationes Mathematicae Universitatis Carolinae,
vol. 28
(1987),
issue 1,
pp. 165-171
Figiel, T.; Kwapień, S.: Discontinuous invariant functio- nals and traces.
(English).
In:
Frolík, Zdeněk (ed.): Abstracta. 9th Winter School on Abstract Analysis.
Czechoslovak Academy of Sciences, Praha, 1981.
pp. 23-24