Psychology and Non-Photorealistic Rendering: The Beginning of a Beautiful Relationship. - Nick Halper; Mara Mellin; Christoph S. Herrmann; Volker Linneweber; Thomas Strothotte (MuC, 2003)

Rendering and Affect. - David J. Duke; Philip J. Barnard; Nick Halper; Mara Mellin (Comput. Graph. Forum, 2003)