- ^ [1] [dead link ]
- ^ "2017 420 World Championships". 2017 420 World Championships. Retrieved 18 January 2018.
- ^ "2018 420 World Championships". 2018 420 World Championships. Retrieved 15 August 2018.
- ^ "2019 420 World Championships". 2019 420 World Championships. Retrieved 11 July 2019.