Johan Bollen Herbert Van de Sompel An architecture for the aggregation and analysis of scholarly usage data. 298-307 2006 conf/jcdl/2006 JCDL https://doi.org/10.1145/1141753.1141821 https://www.wikidata.org/entity/Q56566229 db/conf/jcdl/jcdl2006.html#BollenS06