Xin shi jie da xue ying yu shi ting shuo jiao chengGe li nuo er, Zhou yan · First published 2011Open the Tome
Kuai le yu er shou ceMing qiao da er, Tai tian zhi zi, Duan yan yan · First published 2010Open the Tome
Taiya'er yu wen fa (Taiya'er yu yan yan jiu jie shao)Alberto Papa · First published 1986Open the Tome
![Cover of Han yu "er" [r] yin shi yan jiu](https://covers.openlibrary.org/b/isbn/9787100015219-M.jpg?default=false)
