High-level procedural shading VRML/X3D. - Gonçalo Nuno Moutinho de Carvalho (SIGGRAPH Web Graphics, 2003)

Rich media procedural texturing. - Gonçalo Nuno Moutinho de Carvalho (SIGGRAPH Web Graphics, 2004)

X3D programmable shaders. - Gonçalo Nuno Moutinho de Carvalho; Tony Gill; Tony Parisi (Web3D, 2004)