Davies, Ross E. (23 November 2016). "Arthur Conan Doyle's the Reigate Puzzle: A Cartographical and Photographical View (Part 1) (map)". SSRN2875061. {{cite journal}}: Cite journal ต้องการ |journal= (help)
Davies, Ross E. (23 November 2016). "Arthur Conan Doyle's the Reigate Puzzle: A Cartographical and Photographical View (Part 2) (map)". SSRN2875062. {{cite journal}}: Cite journal ต้องการ |journal= (help)
