1. Various papers;Bitume;Groupement Professionnel des Bitumes,1991
2. Les emulsions modifiees;Brule;Route Actualite,1995
3. BSI 1983 Bitumens for Building and Civil Engineering: part 3. Specifications for Bitumen Mixtures, BS 3690. British Standards Institution, London
4. Progress in the trials of pervious macadam;Coldwell;Highways,1989