1. The power of bicompacta with first axiom of countability;Arhangel'skil;Dokl. Akad. N'auk SSSR,1969
2. J.E. Baumgartner 1970 Results and independence proofs in combinational set theory. Doctoral Dissertation, University of California, Berkeley, Calif. (1970).
3. A new class of order types;Annals of Math. Logic,1976
4. Weak saturation properties of ideals;Baumgartner,1975