References
Engeler, E.: Ultrastructures in first-order model theory (Abstract). Notices Am. Math. Soc.11, 465 (1964).
Fraïssé, R.: Sur 1-extension aux relations de quelques propriétés des ordres. Ann. sci. école norm. super.71, 363–388 (1954).
—— Sur quelques classifications des relations basées sur des isomorphismes restraints (partie I). Alger-Mathematiques,2, 15–60 (1955).
Frayne, T., A. Morel, andD. Scott: Reduced direct products. Fund. Math.51, 195–228 (1962). See also: Correction, in Fund. Math.53, 117 (1963).
Keisler, H. J.: Ultraproducts and elementary classes. Kon. Ned. Akad. van Wet., Proc. Ser. A,64, 477–495 (1961).
—— Limit ultrapowers. Trans. Am. Math. Soc.107, 382–408 (1963).
Kochen, S.: Ultraproducts in the theory of models. Ann. Math.74, 221–261 (1961).
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Some of the results of this paper were obtained while the author was with the International Business Machines Research Laboratory, Zürich and the Eidg. Technische Hochschule, Zürich. The paper was written with partial support from National Science Foundation Grant G. P. 1612.
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Engeler, E. On structures defined by mapping filters. Math. Ann. 167, 105–112 (1966). https://doi.org/10.1007/BF01362167
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DOI: https://doi.org/10.1007/BF01362167