Hirschfelder, Klaus; Völkl, Werner; Kühnel, Hans-Ulrich; Sinn, Walther; Huck, Armin (March 2002). "The first continuously variable intake system in the new eight-cylinder engine from BMW". MTZ Worldwide. 63 (3): 2–6. doi:10.1007/bf03227525. ISSN2192-9114.
Volvo Car Corporation. "EngineTechInfo"(PDF). Archived(PDF) from the original on Aug 17, 2016. Retrieved 2017-12-21.
web.archive.org
"Modified VVIS control"(PDF). www.paerl.it. 2011-12-11. Archived(PDF) from the original on 2017-07-11. Retrieved 2017-12-21.
Volvo Car Corporation. "EngineTechInfo"(PDF). Archived(PDF) from the original on Aug 17, 2016. Retrieved 2017-12-21.
worldcat.org
search.worldcat.org
Hirschfelder, Klaus; Völkl, Werner; Kühnel, Hans-Ulrich; Sinn, Walther; Huck, Armin (March 2002). "The first continuously variable intake system in the new eight-cylinder engine from BMW". MTZ Worldwide. 63 (3): 2–6. doi:10.1007/bf03227525. ISSN2192-9114.