The Cauchy Kernel, the Szegö Kernel, and the Riemann Mapping Function. N. Kerzman; E.M. Stein — 1978 Mathematische Annalen
Some remarks on the Marcinkiewicz convexity theorem in the upper triangle C. Berenstein; M. Cotlar; N. Kerzman; P. Krée — 1967 Studia Mathematica