Boundaries and the Fatou theorem for subelliptic second order operators on solvable Lie groups Ewa Damek, Andrzej Hulanicki (1995) Colloquium Mathematicae
Boundary Behavior of Subharmonic Functions on the Unit Disk Žarko Pavićević, Jela Šušić (1998) Matematički Vesnik
Boundary properties of second-order partial derivatives of the Poisson integral for a half-space ℝ + k + 1 ( k > 1 ) . Topuria, S. (1998) Georgian Mathematical Journal
Brownian Excursions and Minimal Thinness. Part III: Applications to the Angular Derivative Problem. Krysztof Burdza (1986) Mathematische Zeitschrift