Mixing Images and Sketches for Retrieving Vector Drawings. - Alfredo Ferreira; Manuel J. Fonseca; Joaquim A. Jorge; M. Ramalho (Eurographics Multimedia Workshop, 2004)

2D PCA-based localization for mobile robots in unstructured environments. - Fernando Carreira; Camilo Christo; Duarte Valério; M. Ramalho; Carlos B. Cardeira; João M. F. Calado; Paulo Jorge Ramalho Oliveira (IROS, 2012)