Czechoslovak Mathematical Journal
Czechoslovak Mathematical Journal > 1997 > 47 > 1 > 163-172
Czechoslovak Mathematical Journal > 1997 > 47 > 1 > 95-104
Czechoslovak Mathematical Journal > 1997 > 47 > 1 > 19-32
Czechoslovak Mathematical Journal > 1997 > 47 > 1 > 83-94