T. Hyttinen et S. Shelah, CONSTRUCTING STRONGLY EQUIVALENT NONISOMORPHIC MODELS FOR UNSUPERSTABLE THEORIES .A., The Journal of symbolic logic, 59(3), 1994, pp. 984-996
We study how equivalent nonisomorphic models an unsuperstable theory c
an have. We measure the equivalence by Ehrenfeucht-Fraisse games. This
paper continues the work started in [HT].