A Postverification Method for Solving Forced Duffing Oscillator Problems without Prescribed Periods. - Lin, Hong-Yen; Yen, Chien-Chang; Jen, Kuo-Ching; Jea, Kang C. (J. Appl. Math., 2014)

Coincidence Points of Weaker Contractions in Partially Ordered Metric Spaces. - Jen, Kuo-Ching; Lin, Ing-Jer; Chen, Chi-Ming (J. Appl. Math., 2013)