Links
[1] https://www.ctsnet.org/user/login?destination=user/456903
[2] https://www.ctsnet.org/print/home/spark02
[3] https://www.ctsnet.org/article/covid-19-teaching-points-south-korean-experience
[4] https://www.ctsnet.org/articles/spark02
[5] https://www.ctsnet.org/society/ctsnet
[6] https://www.ctsnet.org/society/ests