1. International Organization for Standardization (Geneva). International Standard ISO 3665. Photography: intra-oral dental radiographic film—specification. 2nd ed. Geneva: ISO; 1996
2. International Organization for Standardization (Geneva). International Standard ISO 5799. Photography: direct-exposing medical and dental radiographic film/process systems—determination of ISO speed and ISO average gradient. 2nd ed. Geneva: ISO; 1991
3. Sensitometric evaluation of a new F-speed dental radiographic film;Price;Dentomaxillofac Radiol,2001
4. A comparison of D-, E-, and F-speed conventional intraoral radiographic films in endodontic measurement;Sheaffer;Oral Surg Oral Med Oral Pathol Oral Radiol Endod,2002
5. Sensitometric and clinical evaluation of a new F-speed dental X-ray film;Syriopoulos;Dentomaxillofac Radiol,2001