Approximated Phong Shading by using the Euler Method. - Anders Hast; Tony Barrera; Ewert Bengtsson (Eurographics (Short Presentations), 2001)

Improved Shading Performance by Avoiding Vector Normalization. - Anders Hast; Tony Barrera; Ewert Bengtsson (WSCG (Short Papers), 2001)

Improved Bump Mapping by using Quadratic Vector Interpolation. - Anders Hast; Tony Barrera; Ewert Bengtsson (Eurographics (Short Presentations), 2002)

Reconstruction Filters for Bump Mapping. - Anders Hast; Tony Barrera; Ewert Bengtsson (WSCG (Posters), 2002)

Fast specular highlights by modifying the Phong-Blinn model. - Anders Hast; Tony Barrera; Ewert Bengtsson (SIGGRAPH, 2003)

Shading by Spherical Linear Interpolation using De Moivre's Formula. - Anders Hast; Tony Barrera; Ewert Bengtsson (WSCG, 2003)

Fast Intensity Distribution Functions for Soft and Hard Edged Spotlights. - Anders Hast; Tony Barrera; Ewert Bengtsson (WSCG (Short Papers), 2004)

Faster Shading by Equal Angle Interpolation of Vectors. - Tony Barrera; Anders Hast; Ewert Bengtsson (IEEE Trans. Vis. Comput. Graph., 2004)

An algorithm for parallel calculation of trigonometric functions. - Tony Barrera; Anders Hast; Ewert Bengtsson (Conf. Computing Frontiers, 2013)

A chronological and mathematical overview of digital circle generation algorithms - introducing efficient 4- and 8-connected circles. - Tony Barrera; Anders Hast; Ewert Bengtsson (Int. J. Comput. Math., 2016)