P - Project - Duo based in Plymouth, UK, play Portuguese guitar; information about their instruments, with biographies and discography. - http://cmr.soc.plymouth.ac.uk/members/jmartins/pproject/
Fado - Guitar - The origins, construction, tuning and playing techniques for the guitarra. - http://paginas.fe.up.pt/~fado/eng/guitarra1.html
da Silva, Pedro Henriques - Composer and guitarist, playing classical and Portuguese guitar. Includes a biography, and information about his compositions, recordings and performances (with audio samples). - http://www.pedrodasilva.com/
Baptis, Luis - Guitarist, trained classically, now demonstrating the diversity of 14 Portuguese variants of the instrument; includes a biography, discography, and a description of his instruments (including construction and tuning). - http://www.musiclbm.com/
About The Portuguese Guitar - The origins and development of the instruments; explains the difference between the Lisbon and Coimbra models, construction, and its role in Fado style. - http://www.melomusic.nl/pguitar.htm
Playing the Lisbon Portuguese Guitarra - An introduction to playing techniques; includes information on construction, tuning, tablature, techniques and exercises. - http://www.fernandezmusic.com/PortugueseGuitarMethod.html
Portuguese Guitar History - A historical survey of possible origins for the guitarra; the author argues that its roots lie in the Renaissance cittern and 18th century English guitar; also explores ths instrument's use in Fado. - http://www.guitarsite.com/newsletters/010423/17.shtml