The role of tag suggestions in folksonomies. - Dirk G. F. M. Bollen; Harry Halpin (Hypertext, 2009)

Understanding choice overload in recommender systems. - Dirk G. F. M. Bollen; Bart P. Knijnenburg; Martijn C. Willemsen; Mark P. Graus (RecSys, 2010)

Workshop on user-centric evaluation of recommender systems and their interfaces. - Bart P. Knijnenburg; Lars Schmidt-Thieme; Dirk G. F. M. Bollen (RecSys, 2010)

UCERSTI 2: second workshop on user-centric evaluation of recommender systems and their interfaces. - Martijn C. Willemsen; Dirk G. F. M. Bollen; Michael D. Ekstrand (RecSys, 2011)

Remembering the stars?: effect of time on preference retrieval from memory. - Dirk G. F. M. Bollen; Mark P. Graus; Martijn C. Willemsen (RecSys, 2012)

An experimental analysis of suggestions in collaborative tagging. - Dirk G. F. M. Bollen; Harry Halpin (Web Intell. Agent Syst., 2013)