| Download: GFV-29-01 | from UNECE: | .pdf format | |
| Download: WP.15-95-25 | from UNECE: | .pdf format |
| 5. | Process of the GFV HDDF Retrofit task-force activity |
| 6. | Dutch HDDF Test Program |
| 9. | Draft proposals for HDDF Retrofit amendments |
| 7. | Fundamentals & principles of HDDF-retrofit work |