Gresley, William Stukeley: A glossary of terms used in coal mining, E. & F.N. Spon London, New York 1883, Seite 273, Volltext auf archive.org
books.google.com
Marshall Hall: Description of an Aerometer for making the necessary Corrections in Pneumatic Experiments, for reducing the Volumes of the Gases to a given Standard. The Journal of science and the arts, Band 5, J. Eastburn & Co., 1818, Seite 52 Online bei Google Books
Thomas John Taylor, On the progressive application of machinery to mining purposes. In: Proceedings, Institution of Mechanical Engineers, Birmingham 1859, Seite 32 Online at Google Books and in The Civil engineer and architect's journal, Band 22, 1859, Seite 279 Google Books
Ronald J. Baken, Robert F. Orlikoff: Clinical measurement of speech and voice Speech Science. Cengage Learning, 2000, Seite 351. ISBN1565938690Online bei Google Books
Phonation types. In Phonetics, Working Papers. (1987). WPP, No. 67: Studies of Phonation Types. UC Los Angeles: Department of Linguistics, UCLA, Seite 31. Online