1. J.G. Bergevin, Surface for sports and other uses, US Patent No. 5489317, Feb 1996
2. J.G. Bergevin, Surface for sports and other uses, United States Patent No. 5850708, 1998
3. J.G. Bergevin, Sports playing surfaces with biodegradable backings, United States Patent No. 6145248, 2000
4. F.K. Fuss, A. Subic, R. Mehta, Sport and the technological and financial arms race: Back to the grass-roots. Sports Technol. 3(1), 1–1 (2010). https://doi.org/10.1080/19346182.2010.511007
5. D. Ted, D. Joe, Synthetic turf system and method, United States Patent No. 7357966, 2008