K σ -bounded sets and filters on ω Louveau, A. (1976) Abstracta. 4th Winter School on Abstract Analysis
Kleinberg sequences and partition cardinals below δ₅¹ Benedikt Löwe (2002) Fundamenta Mathematicae The author computes the Kleinberg sequences derived from the three different normal ultrafilters on δ₃¹.
Kurepa's Hypothesis and a Problem of Ulam on Families of Measures. Karel Prikry (1976) Monatshefte für Mathematik