Z. Wu, H. Sun, G. Liang, and F. Zhang, “Empirical Study on the Relationship between R&D Investment and Performance of Specialized, Refined, Unique and New Enterprises: Based on Data Analysis of A-share Specialized, Refined, Unique and New Listed Companies”, HBEM, vol. 54, pp. 250–259, Apr. 2025, doi: 10.54097/6xc7e983.