Feng, F. (2016) “The Effects of Tianjin’s Openness on Economic Development in Beijing-Tianjin-Hebei Region Based on Extended Solow Model”, International Journal of Economics and Financial Issues, 6(3), pp. 1151–1154. Available at: https://econjournals.com/index.php/ijefi/article/view/2389 (Accessed: 3 May 2024).