E-N. G. Grylonakis, C. K. Filelis-Papadopoulos, G. A. Gravvanis and A. S. Fokas. (2018). An Adaptive Complex Collocation Method for Solving Linear Elliptic PDEs in Regular Convex Polygons Based on the Unified Transform. Numerical Mathematics: Theory, Methods and Applications. 12 (2). 348-369. doi:10.4208/nmtma.OA-2018-0017