Gould, D., Pierce, S., Cowburn, I., Driska, A. Veröffentlicht in International Sport Coaching Journal (2017) “... a case study approach, in-depth interviews at several points in time with Robinson were conducted...”
Khodayar, H., Ghasemi, M., Mohammadi, M. Veröffentlicht in International Journal of Wrestling Science (2011) “...interview...”