نيلز بولين

1. Nils Bohlin [Internet]. Lemelson-MIT. [cited 2023 Mar2 4]. Available from: هنا

 2. Nils I. Bohlin and the Safety Belt [Internet]. National Inventors Hall of Fame. [cited 2023 Mar 24]. Available from: هنا

3. Volvo's three-point safety belt turns 50 [Internet]. Volvo Cars Global Media Newsroom; 2009. [cited 2023 Mar 24]. Available from: هنا