A Perturbation Method in Conformal Mapping. (Short Communication). S.E. Warschawski — 1968 Aequationes mathematicae
On the Derivative of the Riemann Mapping Function Near a Boundary Point and the Visser-Ostrowski Problem. Burton Rodin; S.E. Warschawski — 1980 Mathematische Annalen
On the quantitative boundary behavior of conformal maps. Ch. Pommerenke; S.E. Warschawski — 1982 Commentarii mathematici Helvetici