@inbook{b5a52825edcc4cbdb78c705bab64f5e1,
title = "Establishing Line Tracing on a Touch Monitor as a Basic Drawing Skill in Chimpanzees ( Pan troglodytes )",
author = "Iversen, \{Iver H.\} and Tetsuro Matsuzawa",
note = "Using written symbols is essential for human communication. Effective written communication requires that each subject can read and write or produce the visual symbols. Therefore, considerable worldwide educational efforts are expended to teach children symbols such as letters, signs, and numbers.",
year = "2008",
month = jan,
doi = "10.1007/978-4-431-09423-4\_12",
language = "American English",
isbn = "978-4-431-09422-7",
series = "Default journal",
pages = "235–268",
booktitle = "Primate Origins of Human Cognition and Behavior",
}