Most papers are available on-line here .
On the size of classes with weak membership properties, Theoretical Computer Science, vol. I. Tomescu, M. Zimand, Minimum Spanning Hypertrees, Discrete Appl. If not empty, NP-P is topologically large, Theoret. C. Calude, G. Istrate, M. Zimand, Recursive Baire Classification and Speedable Functions, Zeitschr. M. Zimand, Set Restricted Relativization, Anal.