1. International Conference on Mathematics Education 2018

https://drive.google.com/file/d/1tbZ2pivh1xuY_aSdpnwU8JlMHW9EfV0N/view?usp=drive_open

2. Full text of journal reports

https://tapchigiaoduc.moet.gov.vn/vi/magazine/volume-5-december-2018/