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| 2009 | ||
|---|---|---|
| 2 | Robert O. Hastings: Disambiguation of Fingerprint Ridge Flow Direction - Two Approaches. SCIA 2009: 530-539 | |
| 2007 | ||
| 1 | Robert O. Hastings: Ridge Enhancement in Fingerprint Images Using Oriented Diffusion. DICTA 2007: 245-252 | |
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