From Gamification to Funification of Exercise: Case Zombie Run Pori 2015. - Usva Friman; Riikka Turtiainen (GamiFIN, 2017)

"Not Only for a Celebration of Competitive Overwatch but Also for National Pride": Sportificating the Overwatch World Cup 2016. - Riikka Turtiainen; Usva Friman; Maria Ruotsalainen (Games Cult., 2020)