Castelos, Maravilhas de Portugal, volume II

  by L.M. Silva / M.G. Martins (Centro Atlantico)

  in Portuguese/English

  isbn 978-989-615-238-3

  Castelos, Fortalezas e Torres

  by V. Coutinho (Algarve em Foco)

  in Portuguese

  isbn n/a

  Guia dos Castelos Antigos de Portugal - volume I

  by C.T. North (Bertrand Editora)

  in Portuguese

  isbn 972-25-1264-1

  Guia dos Castelos Antigos de Portugal - volume II

  by C.T. North (Bertrand Editora)

  in Portuguese

  isbn 972-25-1267-6

  Portuguese Castles

  by J.G. Monteiro / M.L. Pontes (IPPAR)

  in English

  isbn 972-8736-10-X