Overhead camshaft engine (English Wikipedia)

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Thorpe, Leslie Aaron (1936). A text book on aviation: the new cadet system of ground school training. Vol. 3. Aviation Press. pp. 14–15. Retrieved 27 February 2015. The overhead camshafts are driven by bevel gears and vertical shafts known as tower shafts.
Mueller, Mike (2006). "Chapter 6 - Chariot of the Gods Duesenberg Straight Eight". American Horsepower 100 Years of Great Car Engines. St. Paul, MN USA: Motorbooks. p. 51. ISBN 978-0-7603-2327-4. LCCN 2006017040. Retrieved 2015-02-02.

bringatrailer.com

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dansmc.com

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espacenet.com

worldwide.espacenet.com

A US patent 1495620 A, John Godfrey Parry Thomas, "Internal Combustion Engine", issued 1924-05-27

europeancarweb.com

"An Echo of the Past — the history and evolution of twin-cam engines". www.EuropeanCarWeb.com. European Car Magazine, Source Interlink Media. February 2009. Archived from the original on 3 March 2012. Retrieved 29 August 2012.

honda.com

powersports.honda.com

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kawasaki.eu

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i.kinja-img.com

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loc.gov

lccn.loc.gov

Dorries, Elisabeth H. (2005). TechOne: Automotive Engine Repair. Clifton Park, NY US: Thompson Delmar Learning. ISBN 1-4018-5941-0. LCCN 2004057974. Retrieved 1 March 2015.
Norbye, Jan P. (1981). The complete handbook of automotive power trains. Tab Books. p. 318. ISBN 0-8306-2069-9. LCCN 79026958. Retrieved 7 January 2015.
Georgano, G. N. (1982) [1968]. "Maudslay". In Georgano, G. N. (ed.). The New Encyclopedia of Motorcars 1885 to the Present (Third ed.). New York: E. P. Dutton. p. 407. ISBN 0525932542. LCCN 81-71857.
Mueller, Mike (2006). "Chapter 6 - Chariot of the Gods Duesenberg Straight Eight". American Horsepower 100 Years of Great Car Engines. St. Paul, MN USA: Motorbooks. p. 51. ISBN 978-0-7603-2327-4. LCCN 2006017040. Retrieved 2015-02-02.

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motorsportmagazine.com

Heseltine, Richard (June 2010). Roebuck, Nigel (ed.). "Triumph Dolomite Sprint". Motor Sport. 86 (6). London, UK: 122. ISSN 0027-2019. Retrieved 29 March 2015.
Boddy, William (January 1964). "Random Thoughts About O.H.C." Motor Sport. XL (1). London, UK: Teesdale Publishing.
Boddy, William (August 1972). Boddy, William (ed.). "An Edwardian Overhead-Camshaft 25/30 Maudslay". Motor Sport. XLVIII (8). London, UK: Teesdale Publishing: 909. Archived from the original on 6 February 2015. Retrieved 6 February 2015.
Boddy, William (March 1974). Boddy, William (ed.). "How Did The Leyland Eight Rate?". Motor Sport. L (3): 230. Retrieved 3 January 2015.

patents.google.com

U.S. patent 1,495,620

samarins.com

"OHV, OHC, SOHC and DOHC (twin cam) engine - Automotive illustrated glossary". www.samarins.com. Retrieved 2018-09-20.

telegraph.co.uk

Ash, Kevin (26 October 2011). "Kawasaki W800 review". The Telegraph. Archived from the original on 21 June 2013.

web.archive.org

"How It Works: Honda Unicam® Engines". www.honda.com. 23 January 2013. Archived from the original on 22 February 2014. Retrieved 2 January 2015.
"2010 Honda VFR1200A First Ride". www.moto123.com. 19 October 2009. Archived from the original on 2 January 2015. Retrieved 2 January 2015.
Boddy, William (August 1972). Boddy, William (ed.). "An Edwardian Overhead-Camshaft 25/30 Maudslay". Motor Sport. XLVIII (8). London, UK: Teesdale Publishing: 909. Archived from the original on 6 February 2015. Retrieved 6 February 2015.
Ash, Kevin (26 October 2011). "Kawasaki W800 review". The Telegraph. Archived from the original on 21 June 2013.
"Marr Auto Car Company". www.marrautocar.com. Archived from the original on 11 April 2018.
"An Echo of the Past — the history and evolution of twin-cam engines". www.EuropeanCarWeb.com. European Car Magazine, Source Interlink Media. February 2009. Archived from the original on 3 March 2012. Retrieved 29 August 2012.
"Technical- Boxer History". www.alfisti.co.uk. Archived from the original on 29 March 2013.

worldcat.org

Heseltine, Richard (June 2010). Roebuck, Nigel (ed.). "Triumph Dolomite Sprint". Motor Sport. 86 (6). London, UK: 122. ISSN 0027-2019. Retrieved 29 March 2015.
Lewis, Jimmy (November 2001). Edwards, David (ed.). "New for '02: Honda CR250R CRF450R". Cycle World. 40 (11). Hachette-Filipacchi Magazines: 62. ISSN 0011-4286. Retrieved 2 January 2015.
Decker, John (June 1993). Oldham, Joe (ed.). "Saturday Mechanic: Replacing Your Timing Belt". Popular Mechanics. 170 (6). New York, NY US: Hearst. ISSN 0032-4558. Retrieved 1 March 2015.
Cameron, Kevin (March 2004). "TDC: Little things". Cycle World. 43 (3): 14. ISSN 0011-4286. Retrieved 7 January 2015.
Simanaitis, Dennis (January 1994). Bryant, Thos L. (ed.). "Tech Tidbits". Road & Track. 45 (6). Newport Beach, CA US: Hachette Filipacchi Magazines: 121. ISSN 0035-7189.