- 427 'Semi-Competition'". Silodrome. Auto,
Motor und
Sport 25/1988
Bernd Woytal (2015-10-18). "Ferrari F40
gegen Porsche 959: Nonplusultra-Supersportler...
- "Competizione" for sale".
Motor Authority. Auto,
Motor und
Sport 25/1988
Bernd Woytal (18
October 2015). "Ferrari F40
gegen Porsche 959: Nonplusultra-Supersportler...
- Twin-Turbo Ruf". Road & Track. US. Auto,
Motor und
Sport 25/1988
Bernd Woytal (18
October 2015). "Ferrari F40
gegen Porsche 959: Nonplusultra-Supersportler...
- of the 1980s".
Retrieved 1
September 2023. auto
motor und sport, 25/1988
Woytal,
Bernd (18
October 2015). "Ferrari F40
gegen Porsche 959: Nonplusultra-Supersportler...
- Cars 1987,
Penguin Books Ltd, p. 144, ISBN 978-0723234593 Barbaza, p. 89
Woytal,
Bernd (July 2017). "Sportlich & günstig?" [Sporty and cheap?].
Motor Kl****ik...
- (in German).
Motorbuch Verlag. pp. 454, 466 & 467. ISBN 3-613-02131-5.
Woytal,
Bernd (July 2017). "Glanznummer" [Big number].
Motor Kl****ik (in German)...
