This is a dynamic list and may never be able to satisfy particular standards for completeness. You can help by editing the page to add missing items, with references to reliable sources.
"Oporto", Handbook for Travellers in Portugal, Murray's hand-book Portugal, Madeira, Azores, and Canaries (4thed.), London: J. Murray, 1887, pp.115+, hdl:2027/hvd.hn2ha1
John Lomas, ed. (1889), "Porto", O'Shea's Guide to Spain and Portugal (8thed.), Edinburgh: Adam & Charles Black
Nuno Portas; etal. (2004). "Porto Urban Region". In Antonio Font (ed.). Explosion of the City (in Catalan and English). Barcelona: Colegio de Arquitectos de Cataluña. ISBN8496185184.
Miguel Serra; Paulo Pinho (2011). "Dynamics of periurban spatial structures: investigating differentiated patterns of change on Oporto's urban fringe". Environment and Planning B: Planning and Design. 38 (2): 359–382. Bibcode:2011EnPlB..38..359S. doi:10.1068/b36092. S2CID60820974.
in Portuguese
Pinho Leal (1876). "Porto". Portugal Antigo e Moderno: Diccionario... (in Portuguese). Vol.7. Mattos Moreira. pp.268–554. (+ Index)
Alberto Pimentel (1878). O Porto por fora e por dentro[Porto inside and out] (in Portuguese).
Manuel Pinheiro Chagas, ed. (1881). "Porto". Diccionario Popular (in Portuguese). Vol.10. Lisbon: Joaquim Germano de Sousa Neves. pp.15–34.
Damião Peres; etal., eds. (1962–1965). História da Cidade do Porto (in Portuguese). Portucalense editora. OCLC460632616.
J. M. P. de Oliveira (1973). O espaço urbano do Porto: Condições naturais e desenvolvimento (in Portuguese). Coimbra.{{cite book}}: CS1 maint: location missing publisher (link)
Marie-Therèse Mandroux-França (1984). Quatro fases de urbanização do Porto no século XVIII (in Portuguese).
Francisco Ribeiro da Silva (1988). O Porto e o seu Termo - Os homens, as instituições e o poder (1580-1640) (in Portuguese). Câmara Municipal do Porto.