1. Borg's Periodicity Theorems for First-Order Self-Adjoint Systems with Complex Potentials. Issue 3 (19th December 2016) Authors: Currie, Sonja; Roth, Thomas T.; Watson, Bruce A. Journal: Proceedings of the Edinburgh Mathematical Society Issue: Volume 60:Issue 3(2017) Page Start: 615 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗