The Essentials: 5 Great Howard Hawks Films
http://www.indiewire.com/2012/05/the-essentials-5-great-howard-hawks-films-110154/
An article about Howard Hawks's films (including The Big Sleep) on Indiewire
The Big Sleep (1946)
http://filmexpression.blogspot.com/2009/05/big-sleep-1946.html
An article about the film on a film blog, Film Expression
The Bigger Sleep
https://www.newyorker.com/magazine/2014/12/15/bigger-sleep
An article in The New Yorker by Richard Brody about the two releases of the film.
Notes on The Big Sleep, 30 years after
http://www.bfi.org.uk/news-opinion/sight-sound-magazine/features/notes-big-sleep-30-years-after
An article from Sight and Sound Magazine analyzing the film.
THE SCREEN; 'The Big Sleep,' Warner Film in Which Bogart and Bacall Are Paired Again, Opens at Strand --'Step by Step' of the Rialto
http://www.nytimes.com/movie/review?res=9F00E5DB143FE73ABC4C51DFBE66838D659EDE
A negative review of the film by Bosley Crowther in The New York Times