2004 · Alcido Elenor Wander, Marília Castelo Magalhães, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 11
2020 · Ricardo Alves Araújo, Roberto Cláudio Fernandes Franco Pompeu, et al. · LA Referencia (Red Federada de Repositorios Institucionales de Publicaciones Científicas) · 1
2005 · Maria Irles de Oliveira Mayorga, Kilmer Coelho Campos, et al. · Portuguese National Funding Agency for Science, Research and Technology (RCAAP Project by FCT) · 1