1. Kim, M.S., Jang, M.D., Choi, H.I., Rhee, T.H., Kim, J.H., Kwag, H.K.: Digitalizing scheme of handwritten Hanja historical documents. In: Proceedings of the 1st International Workshop on Document Image Analysis for Libraries, USA, pp. 321–327, Jan. 2004
2. Shih, V.J., Chu, T.L.: The Han Nom Digital Library. In: The International Nom Conference, The National Library of Vietnam, Hanoi, pp. 12–14, Nov. 2004
3. Phan, T.V., Zhu, B., Nakagawa, M.: Development of Nom character segmentation for collecting patterns from historical document pages. In: Proceedings of 1st International Workshop on Historical Document Imaging and Processing, China, pp. 133–139, Sep. 2011
4. Phan, T.V., Zhu, B., Nakagawa, M.: Collecting handwritten Nom character patterns from historical document pages. In: Proceedings of 10th IAPR International Workshop on Document Analysis Systems, Australia, pp. 344–348, Mar. 2012
5. Su, B., Lu, S., Tan, C.L.: Binarization of historical handwritten document images using local maximum and minimum filter. In: Proceedings of the 9th IAPR International Workshop on Document Analysis Systems, USA, pp. 159–165, Jun. 2010