System deep usage in post-acceptance stage: a literature review and a new research framework. - Wei Wang; John E. Butler (Int. J. Bus. Inf. Syst., 2006)

Innovate with Complex Information Technologies: A Theoretical Model and Empirical Examination. - Wei Wang 251; John E. Butler; J. J. Po-An Hsieh; Sheng-Hsun Hsu (J. Comput. Inf. Syst., 2008)