The Degree of a Sigman Cut. - Chi Tat Chong; K. J. Mourad (Ann. Pure Appl. Log., 1990)

Isomorphisms of Non-Standard Fields and Ash's Conjecture. - Rumen D. Dimitrov; Valentina S. Harizanov; Russell G. Miller; K. J. Mourad (CiE, 2014)