![[ACM Press the 20th international conference - Hyderabad, India (2011.03.28-2011.04.01)] Proceedings of the 20th international conference on World wide web - WWW '11 - Buy-it-now or take-a-chance]()
[ACM Press the 20th international conference - Hyderabad, India (2011.03.28-2011.04.01)] Proceedings of the 20th international conference on World wide web - WWW '11 - Buy-it-now or take-a-chanceCelis, L. Elisa; Lewis, Gregory; Mobius, Markus M.; Nazerzadeh, Hamid · 2011