Kuan-Ta Chen Chi-Jui Chang Chen-Chi Wu Yu-Chun Chang Chin-Laung Lei Quadrant of euphoria: a crowdsourcing platform for QoE assessment. 28-35 2010 24 IEEE Network 2 http://dx.doi.org/10.1109/MNET.2010.5430141 db/journals/network/network24.html#ChenCWCL10