Facial Sketching Based on Sub-Image Illumination Removal and Multiscale Edge Filtering. - F. A. P. V. Arruda; V. A. Porto; Herman Martins Gomes; José Eustáquio Rangel de Queiroz; Nathan Moroney (SITIS, 2007)

A New NPR Approach for Image Stylization: Combining Edges, Color Reduction and Facial Exaggerations. - F. A. P. V. Arruda; V. A. Porto; J. B. O. Alencar Júnior; Herman Martins Gomes; José Eustáquio Rangel de Queiroz; Nathan Moroney (CIMCA/IAWTIC/ISE, 2008)

Non-photorealistic neural sketching - A case study on frontal-face images. - Francisco de Assis Pereira Vasconcelos de Arruda; José Eustáquio Rangel de Queiroz; Herman Martins Gomes (J. Braz. Comput. Soc., 2012)