Hagring, O. (1998). Vehicle-vehicle interactions at roundabouts and their implications for the entry capacity: A methodological study with applications to two-lane roundabouts. Lund Institute of Technology.

Hagring, Ola. Vehicle-vehicle Interactions at Roundabouts and Their Implications for the Entry Capacity: A Methodological Study with Applications to Two-lane Roundabouts. Lund, Sweden: Lund Institute of Technology, 1998.

Hagring, Ola. Vehicle-vehicle Interactions at Roundabouts and Their Implications for the Entry Capacity: A Methodological Study with Applications to Two-lane Roundabouts. Lund Institute of Technology, 1998.