Ovum interconnect : quarterly update / ed. Ovum
The European interconnection manual / ed. ICC - InterConnect Communications Ltd.
Next generation call centres: CTI, voice and the web / David Bradshaw, Stephen Wood and John Delaney
Manual para a gestão de documentos / Instituto dos Arquivos Nacionais - Torre do Tombo; coord. Madalena Garcia, Maria João Pires de Lima; elab. Cecília Henriques, Francisco Barbedo e Luís Montalvão