1. Diophantine problems over local fields I–II;Ax;Amer. J. Math.,1965
2. Diophantine problems over local fields III;Ax;Ann. of Math.,1966
3. Admissible sets and structures;Barwise,1975
4. An Introduction to First-Order Logic;Barwise,1982
5. Groups with the Same Lower Central Sequence as a Relatively Free Group. I. The Groups;Baumslag;Trans. Amer. Math. Soc.,1967