@inproceedings{ICDAR-1993-LinSOS,
	author        = "Ying Ming Lin and Takeshi Sagara and Yutaka Ohsawa and Masao Sakauchi",
	booktitle     = "{Proceedings of the Second International Conference on Document Analysis and Recognition}",
	doi           = "10.1109/ICDAR.1993.395597",
	isbn          = "0-8186-4960-7",
	pages         = "878--881",
	publisher     = "{IEEE}",
	title         = "{An object-oriented kernel for geographical information systems}",
	year          = 1993,
}