1. Axioms for abstract model theory;Barwise;Ann. Math. Logic,1974
2. Regularnye i ubyvajusche nepolnye ultrafiltri;Čudonowsky;Dokl. Akad. Nauk. SSSR,1989
3. Large Infinitary Languages;Dickmann,1976
4. Two notes on abstract model theory, I;Feferman;Fund. Math.,1974
5. Two notes on abstract model theory, II;Feferman;Fund. Math.,1975