Industrial trucks - Safety requirements and verification - Part 4: Driverless industrial trucks and their systems (ISO 3691-4:2020); German version EN ISO 3691-4:2020— 104 стр.
Industrial trucks - Safety requirements and verification - Part 4: Driverless industrial trucks and their systems (ISO/DIS 3691-4:2018); German and English version prEN ISO 3691-4:2018