Mohramzadeh, M., Fathi, F., Saiwan nouri, M. (2019). 'Analyzing the Motivations for the Presence of Spectators in the 2018 Volleyball Nations League (VNL) and its Relationship with Background, Amount and Renewed Presence', Research in sport Management, 8(8), pp. 47-74. doi: 10.22054/qrsm.2019.11014