Exploring the nonlinear effects of patent H index, patent citations, and essential technological strength on corporate performance by using artificial neural network. - Sifei Zhang; Chien-Chung Yuan; Ke-Chiun Chang; Yun Ken (J. Informetrics, 2012)

Threshold effects of the patent H-index in the relationship between patent citations and market value. - Ke-Chiun Chang; Wei Zhou; Sifei Zhang; Chien-Chung Yuan (J. Assoc. Inf. Sci. Technol., 2015)