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 November 27, 2024. https://jeelm.vgtu.lt/index.php/JBEM/article/view/2580.