Sentences with finite models. - Christopher J. Ash (Math. Log. Q., 1975)

Some Theories Associated with Algebraically Closed Fields. - Christopher J. Ash; John W. Rosenthal (J. Symb. Log., 1980)

Decidable Subspaces and Recursively Enumerable Subspaces. - Christopher J. Ash; Rodney G. Downey (J. Symb. Log., 1984)

Stability of recursive structures in arithmetical degrees. - Christopher J. Ash (Ann. Pure Appl. Log., 1986)

Intersections of algebraically closed fields. - Christopher J. Ash; John W. Rosenthal (Ann. Pure Appl. Log., 1986)

Categoricity in hyperarithmetical degrees. - Christopher J. Ash (Ann. Pure Appl. Log., 1987)

Generic Copies of Countable Structures. - Christopher J. Ash; Julia F. Knight; Mark S. Manasse; Theodore A. Slaman (Ann. Pure Appl. Log., 1989)

Labelling Systems and r.e. Structures. - Christopher J. Ash (Ann. Pure Appl. Log., 1990)

Pairs of Recursive Structures. - Christopher J. Ash; Julia F. Knight (Ann. Pure Appl. Log., 1990)

On the Varieties of Languages Associated with Some Varieties of Finite Monoids with Commuting Idempotents - Christopher J. Ash; Thomas Eric Hall; Jean-Eric Pin (Inf. Comput., 1990)

Inevitable Graphs: a Proof of the Type II Conjecture and some Related Decision Procedures. - Christopher J. Ash (Int. J. Algebra Comput., 1991)

A Construction for Recursive Linear Orderings. - Christopher J. Ash (J. Symb. Log., 1991)

Generalizations of Enumeration Reducibility Using Recursive Infinitary Propositional Sentences. - Christopher J. Ash (Ann. Pure Appl. Log., 1992)

Ramified Systems. - Christopher J. Ash; Julia F. Knight (Ann. Pure Appl. Log., 1994)

On Countable Fractions from an Elementary Class. - Christopher J. Ash (J. Symb. Log., 1994)

Mixed Systems. - Christopher J. Ash; Julia F. Knight (J. Symb. Log., 1994)

A Conjecture Concerning the Spectrum of a Sentence. - Christopher J. Ash (Math. Log. Q., 1994)

A Completeness Theorem for Certain Classes of Recursive Infinitary Formulas. - Christopher J. Ash; Julia F. Knight (Math. Log. Q., 1994)

Possible Degrees in Recursive Copies. - Christopher J. Ash; Julia F. Knight (Ann. Pure Appl. Log., 1995)

Recursive Structures and Ershov's Hierarchy. - Christopher J. Ash; Julia F. Knight (Math. Log. Q., 1996)

Permitting, Forcing, and Copying of a Given Recursive Relation. - Christopher J. Ash; Peter Cholak; Julia F. Knight (Ann. Pure Appl. Log., 1997)

Possible Degrees in Recursive Copies II. - Christopher J. Ash; Julia F. Knight (Ann. Pure Appl. Log., 1997)

Quasi-Simple Relations in Copies of a Given Recursive Structure. - Christopher J. Ash; Julia F. Knight; Jeffrey B. Remmel (Ann. Pure Appl. Log., 1997)