Geprofileerde wegmarkeringen : een literatuurstudie in opdracht van de Deutsche Studiengeselschaft der Hersteller von Markierungsglasperlen 9DSGM0, Essen, voor de Forschungsgesellschaft für Strassen- und Verkehrswesen e.V., Köln.

Some conclusions: 1) There are three reasons why a certain profile should be inserted in the road marking. 2) There are several possibilities to do so. 3) There is little literature on this subject. More research should be done, with test regions preferably. See also ste Gerrman translation PB 19778.