Errata to the paper "Remarks of the elementary theories of formal and convergent power series" Fundamenta Mathematicae 105 (1980), pp. 229-239 Joseph Becker, Leonard Lipshitz (1981) Fundamenta Mathematicae
Existentially closed domains with radical relations. A. Prestel, J. Schmid (1990) Journal für die reine und angewandte Mathematik