【作者(必填)】
Geoff CummingJohn Self
【文题(必填)】
Intelligent educational systems: identifying and decoupling the conversational levels
【年份(必填)】
January 1990, Volume 19, Issue 1, pp 11–27
【全文链接或数据库名称(选填)】https://link.springer.com/article/10.1007/BF00377983