1. J. Baumgartner,Applications of the proper forcing axiom, to appear.
2. J. Baumgartner and A. Taylor,Saturation properties of ideals in generic extensions II, Trans. Am. Math. Soc.271 (1982), 587–609.
3. K. J. Devlin,A Yorkshireman's guide to proper forcing, to appear.
4. F. Galvin, T. Jech and M. Magidor,An ideal game, J. Symb. Logic43 (1978), 284–292.
5. T. Jech, M. Magidor, W. Mitchell and K. Prikry,Precipitous ideals, J. Symb. Logic45 (1980), 1–8.