An empirical examination of the existing models for Bradford's law. - Liwen Qiu (Inf. Process. Manag., 1990)

Complete or incomplete data sets. The Groos droop investigated. - Liwen Qiu; Jean Tague (Scientometrics, 1990)

Markov Models of Search State Patterns in a Hypertext Information Retrieval System. - Liwen Qiu (J. Am. Soc. Inf. Sci., 1993)

Frequency Distributions of Hypertext Path Patterns: A Pragmatic Approach. - Liwen Qiu (Inf. Process. Manag., 1994)

Task-Oriented Access to Data Files: An Evaluation. - Carolyn R. Watters; Michael A. Shepherd; Liwen Qiu (J. Am. Soc. Inf. Sci., 1994)