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| 2007 | ||
|---|---|---|
| 2 | EE | Donghun Kim, Philip Sugai: Differences in consumer loyalty and willingness to pay for service attributes across digital channels: the case of Japanese digital content market. IWCMC 2007: 231-235 |
| 1 | EE | Philip Sugai: Exploring the impact of handset upgrades on mobile content and service usage. IJMC 5(3): 281-299 (2007) |
| 1 | Donghun Kim | [2] |