Digital Library Evaluation by Analysis of User Retrieval Patterns. - Johan Bollen; Somasekhar Vemulapalli; Weining Xu (ECDL, 2002)

Security in Distributed Digital Libraries: Issues and Challenges . - Somasekhar Vemulapalli; Mahantesh Halappanavar; Ravi Mukkamala (ICPP Workshops, 2002)

Detecting Research Trends in Digital Library Readership. - Johan Bollen; Richard Luce; Somasekhar Vemulapalli; Weining Xu (ECDL, 2003)

Usage Analysis for the Identification of Research Trends in Digital Libraries. - Johan Bollen; Somasekhar Vemulapalli; Weining Xu; Rick Luce (D Lib Mag., 2003)