@article{10.2307/1466884,
 ISSN = {10508406, 15327809},
 URL = {http://www.jstor.org/stable/1466884},
 author = {Timothy Koschmann},
 journal = {The Journal of the Learning Sciences},
 number = {1},
 pages = {111--113},
 publisher = {Taylor & Francis, Ltd.},
 title = {Concepts and Categories},
 volume = {14},
 year = {2005}
}