Yan, Koon-Kiu, Gerstein, Mark, The Spread of Scientific Information: Insights from the Web Usage Statistics in PLoS Article-Level Metrics, in: PLoS ONE 6 5 (2011), S. e19917.

Walker, Dylan, Xie, Huafeng, Yan, Koon-Kiu, Maslov, Sergei, Ranking scientific publications using a model of network traffic, in: Journal of Statistical Mechanics: Theory and Experiment 2007 06 (2007), S. P06010.