1. Defining algebraic elements;Bacsich;J. Symobolic Logic,1973
2. On strongly minimal sets;Baldwin;J. Symobolic Logic,1971
3. Completing theories by forcing;Barwise;Ann. Math. Logic,1970
4. On union of chains of models;Chang;Proc. Am. Math. Soc.,1959
5. Model Theory;Chang,1973