1. Admissible sets and the saturation of structures;Adamson;Ann. Math. Logic,1978
2. Refinements of Vaught's normal form theorem;Harnik;Symbolic Logic,1979
3. Primitive recursive set functions;Jensen,1971
4. Vaught sentences and Lindstrom's regular relations;Makkai,1973
5. Admissible sets and infinitary logic;Makkai,1977