1. Espaces et reseaux pietonniers;Bovy;Strasse und Verkehr,1974
2. A possible design criteria for pavement width;Collis;Traffic Engineering & Control,1975
3. Design for pedestrians: A level-of-service concept;Fruin;Highway Research Record,1971
4. Pedestrian movements on footways;Mōri;Transactions of JSCE,1977
5. Determining the width of sidewalks;Mōri;Transactions of JSCE,1981