| |
| 1989 | ||
|---|---|---|
| 2 | EE | Stephen Schon, Omar Keith Helferich: Expert System Applications in Customer Service. DATA BASE 20(2): 38-46 (1989) |
| 1987 | ||
| 1 | EE | Stephen Schon, Omar Keith Helferich: Expert System Applications in Customer Service. SIGBDP-SIGCPR 1987: 140-162 |
| 1 | Omar Keith Helferich | [1] [2] |