1. Barber , R. and Salichs , Ma. 2002 . A new human based architecture for intelligent autonomous robots. InIntelligent autonomous vehicles 2001 (IAV 2001): a proceedings volume from the 4th IFAC Symposium, Sapporo, Japan, 5–7 September 2001, 81. Pergamon.http://scholar.google.es/scholar?cluster=10839062160608396845&hl=es&as_sdt=2000#0
2. Bennett , C. , Llitjós , A. F. , Shriver , S. , Rudnicky , A. I. , and Black , A. W. 2002 . Building VoiceXML-based applications. InSeventh International Conference on Spoken Language Processing, 2–5. Citeseer.http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.73.228&rep=rep1&type=pdf
3. Bischoff , R. and Graefe , V. 2004 . HERMES – a versatile personal robotic assistant.Proceedings of the IEEE92, no. 11: 1759–1779. doi:10.1109/JPROC.2004.835381.http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=1347457
4. Breazeal , C. 2003 . Emotive qualities in lip-synchronized robot speech.Advanced Robotics17, no. 2 (May): 97–113. doi:10.1163/156855303321165079.http://www.ingentaconnect.com/content/vsp/arb/2003/00000017/00000002/art00003
5. Chan , S. W. K. 1995 . Inferences in natural language understanding. InProceedings of 1995 IEEE International Conference on Fuzzy Systems. The International Joint Conference of the Fourth IEEE International Conference on Fuzzy Systems and The Second International Fuzzy Engineering Symposium, 935–940. IEEE. doi:10.1109/FUZZY.1995.409794.http://ieeexplore.ieee.org/xpl/freeabs_all.jsp?arnumber=409794