| 2006 | ||
|---|---|---|
| 2 | P. T. Helo: Product configuration analysis with design structure matrix. Industrial Management and Data Systems 106(7): 997-1011 (2006) | |
| 2003 | ||
| 1 | P. T. Helo: Technology trajectories in mobile telecommunications: analysis of structure and speed of development. IJMC 1(3): 233-246 (2003) | |