Universality Connections Between Eight Vertex, Ashkin-Teller and Gaussian Models.

Renormalization connection between the eight-vertex model and the gaussian model

Universality-Nonuniversality Crossover in the Ashkin-Teller Model

Universal ratios along a line of critical points. The Ashkin–Teller model

Anomalous Universality in the Anisotropic Ashkin–Teller Model

Renormalization connection between eight-vertex operators and Gaussian operators

Renormalization connection between eight-vertex operators and Gaussian operators