^Elizabeth David (April 5, 1990) [1954]. Italian Food. Barrie & Jenkins. ISBN978-0-7126-2000-0
^ abcDelia Smith (1998). Delia's How To Cook. Book One. BBC Worldwide. pp. 48–49. ISBN0-563-38430-1. "the Italian word here is lentamente – very slowly"
^ abRobert Carrier (1967) [1963]. Great Dishes of the World. Sphere Books. p. 121. ISBN0-7221-2172-5
^ abcSarah Brown (1984). Vegetarian Cookbook. HarperCollins. p. 127. ISBN0-7225-2694-6