Eisworth, T. & Roitman, J. CH with no Ostaszewski spaces. Trans. Amer. Math. Soc. 351, 2675–2693 (1999). Publisher's Version
Eisworth, T. Selective ultrafilters and ω→(ω) ω. Proc. Amer. Math. Soc. 127, 3067–3071 (1999). Publisher's Version