1. Omkörning av personbilar, trafikstudier;Åhman,1968
2. Omkörning av lastbilar, trafikstudier;Åhman,1972
3. A mathematical model for traffic on a two-lane road with some empirical results;Erlander;Transpn Res.,1971
4. Applications of mathematical and statistical models in the field of road traffic and safety;Erlander,1975
5. An abbreviated procedure for estimating equilibrium queue lengths in rural two-lane traffic;Gipps;Transpn Sci.,1976