1. Algebra in the Stone–Čech Compactification;Hindman,1998
2. Strongly summable ultrafilters on Abelian groups;Hindman;Mat. Stud.,1998
3. Maximal topologies on groups;Protasov;Sib. Math. J.,1998
4. Proper and Improper Forcing;Shelah,1998
5. Versions of Martinʼs axiom;Weiss,1984