The abstract Galois theory: a survey. - Isidore Fleischer (Algebraic Logic and Universal Algebra in Computer Science, 1988)

An algebraic treatment of the barwise compactness theory. - Isidore Fleischer; Philip Scott (Stud Logica, 1991)

Completeness of the Infinitary Polyadic Axiomatization. - Isidore Fleischer (Math. Log. Q., 1993)