| Dagher HJ, Lopez-Anido R, Gardner D, Kahl M, Dura M 2005. "Design of innovative hollow extruded WPC sheet piling", 8th International Conference on Woodfiber-Plastic Composites Proceedings. |

| Dagher HJ, Lopez-Anido R, Gardner D, Kahl M, Dura M 2005. "Design of innovative hollow extruded WPC sheet piling", 8th International Conference on Woodfiber-Plastic Composites Proceedings. |