1. Esports revenues will reach $696 million this year and grow to $1.5 billion by 2020 as brand investment doubles;Warman,2017
2. eSports market size worldwide from 2020 to 2025,2022
3. Virtual(ly) Athletes: Where eSports Fit Within the Definition of “Sport”;Jenny;Quest,2017
4. Definition of Sport;Oxford University Press,2021
5. Rationalising Sports Policies : Sport in Its Social Context;Rodgers,1977