H. Jerome Keisler. A survey of ultraproducts. Logic, methodology and philosophy of science, Proceedings of the 1964 International Congress, edited by Yehoshua Bar-Hillel, Studies in logic and the foundations of mathematics, North-Holland Publishing Company, Amsterdam1965, pp. 112–126.
1970 ◽
Vol 35
(4)
◽
pp. 585-585