1. Iterated forcing;Baumgartner,1983
2. The integers and topology;van Douwen,1984
3. Powers of regular cardinals;Easton;Ann. Math. Logic,1964
4. On the existence of certain cofinal subsets of ωω, Axiomatic Set Theory;Hechler,1974
5. When does almost free imply free?;Magidor;J. Amer. Math. Soc.,1994