Bounded Analytic Functions in the Dirichlet Space. Stefan Richter; Allen Shields — 1988 Mathematische Zeitschrift
An Analogue of a Hardy-Littlewood-Fejér Inequality for Upper Triangular Trace Class Operators. Allen L. Shields — 1983 Mathematische Zeitschrift
Bounded projections, duality, and multipliers in spaces of harmonic functions. Allen L. Shields; David L. Williams — 1978 Journal für die reine und angewandte Mathematik