Oolon Colluphid

Oolin Coluphid was the author of a book, The Origins of the Universe which the Doctor had in his pocket as a way to pass the time when pinned down by fallen rubble. Paging through the book, Doctor snorted and spoke of Coluphid's ignorance. (DW: Destiny of the Daleks)

Behind the Scenes
The character of Oolin Coluphid was mentioned in Douglas Adams' The Hitchhiker's Guide to the Galaxy, who served as Script Editor for Destiny of the Daleks and occasional Doctor Who script writer. The Hitchhiker's Guide series also exists as a fictional work in the Doctor Who Universe. However, due to the exitence of the book in Destiny of the Daleks, it is possible that some elements of The Hitchhiker's Guide to the Galaxy do in fact exist within the Doctor Who Universe.