1. Matching the Playing Field to the Player
2. Temporal patterns of injury during a rugby season
3. High school football injuries: Field conditions and other factors;Andersen B.L.;Wis. Med. J.,1989
4. Spinal injuries in New Zealand rugby and rugby league: A twenty year survey;Armour K.S.;N.Z. Med. J.,1997
5. ASTM.2011.ASTM F2396–11: Standard guide for construction of high performance sand-based rootzones for athletic fields.ASTM West Conshohocken PA.