H. Jerome Keisler. Finite approximations of infinitely long formulas. The theory of models, Proceedings of the 1963 International Symposium at Berkeley, edited by J. W. Addison, Leon Henkin, and Alfred Tarski, Studies in logic and the foundations of mathematics, North-Holland Publishing Company, Amsterdam1965, pp. 158–169. - H. Jerome Keisler. Some applications of infinitely long formulas. The journal of symbolic logic, vol. 30 (1965), pp. 339–349.
1969 ◽
Vol 34
(1)
◽
pp. 129-130