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| 1997 | ||
|---|---|---|
| 1 | EE | Yoshifumi Oyama, Toshihisa Tajima, Hiroaki Koga: Character recognition of mixed convex-concave braille points and legibility of deteriorated braille points. Systems and Computers in Japan 28(2): 44-53 (1997) |
| 1 | Hiroaki Koga | [1] |
| 2 | Toshihisa Tajima | [1] |