Chen, You-hua, Pu-yan Nie, and X. Henry Wang. “Asymmetric Doupoly Competition With Innovation Spillover and Input Constraints”. Journal of Business Economics and Management 16, no. 6 (December 24, 2015): 1124–1139. Accessed May 18, 2025. https://journals.vilniustech.lt/index.php/JBEM/article/view/2580.