Racing Porsche: 1948-1971 (Autosprint, 1971) ELVA, Porsche 356, Porsche 550, Porsche 718, Porsche 804, Porsche 904, Porsche 906, Porsche 907, Porsche 908, Porsche 909, Porsche 910, Porsche 917 19.12.2015 2759
Porsche engines types: 547, 692, 587 ELVA, Porsche 356, Porsche 550, Porsche 718, Porsche 904 24.05.2015 3069
ELVA cars Ltd. history & ELVA Mk VIIS — Porsche (Motor Sport mag., 01-02/1986) ELVA, Porsche 08.04.2015 2102