Zhang, Chunbo, Zhaoguo Huang, and Yonggang Wang. “A Traffic Fundamental Diagram Calibrating Methodology to Avoid Unbalanced speed–density Observations”. Transport 36, no. 1 (February 24, 2021): 13-24. Accessed February 23, 2025. https://btp.vilniustech.lt/index.php/Transport/article/view/14302.