1. [ALL] Alling, N. L.: On exponentially closed fields. Proc. A. M. S.13, 706–711 (1962)
2. [BAR] Barwise, J. (ed.): Back and forth through infinitary logic. In: Morley, M. (ed.) Studies in Model Theory, pp. 5–34. Buffalo, NY: Math. Assoc. Am. 1973
3. [BR] Brown, R.: Valued vector spaces of countable dimension. Publ. Math. Debrecen18, 149–151 (1971)
4. [C-K] Chang, C. C., Keisler, H. J.: Model Theory. Amsterdam London: North Holland 1973
5. [D-L] van den Dries, L., Lewenberg, A.: T-convexity and tame extensions. J. Symb. Logic (to appear)