System of layers of an ordered set
Ladislav Skula (1969)
Czechoslovak Mathematical Journal
Similarity:
Ladislav Skula (1969)
Czechoslovak Mathematical Journal
Similarity:
Ján Jakubík, Judita Lihová (1996)
Mathematica Slovaca
Similarity:
Judita Lihová (1999)
Czechoslovak Mathematical Journal
Similarity: