Boundary value problems for analytic and harmonic functions in domains with nonsmooth boundaries. Applications to conformal mappings. Khuskivadze, Givi, Kokilashvili, Vakhtang, Paatashvili, Vakhtang (1998) Memoirs on Differential Equations and Mathematical Physics
Bounds for oscillatory integrals and L²-theory of the corresponding singular integrals Magdalena Walias-Cuadrado (1984) Studia Mathematica