@inproceedings{ICDAR-1993-NakagawaKMS,
	author        = "Masaki Nakagawa and Naoki Kato and Kimiyoshi Machii and Toshio Souya",
	booktitle     = "{Proceedings of the Second International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.1993.395636",
	isbn          = "0-8186-4960-7",
	pages         = "718--721",
	publisher     = "{IEEE}",
	title         = "{Principles of pen interface design for creative work}",
	year          = 1993,
}