Documenting the pen-based interaction. - Maria da Graça Campos Pimentel; Cássio V. S. Prazeres; Hélder Ribas; Daniel Corrêa Lobato; César A. C. Teixeira (WebMedia, 2006)

Inkteractors: interacting with digital ink. - Renan G. Cattelan; César A. C. Teixeira; Hélder Ribas; Ethan V. Munson; Maria da Graça Campos Pimentel (SAC, 2008)