- scholar.google.com.hk
- 2024-03-13
- scholar.google.com
- 2024-03-13
- scholar.google.com.hk
- 2024-03-13
- sci.xueshuwu.cn
- 2024-03-13
- g88.i-research.edu.eu.org
- 2024-03-13
- x.sci-hub.org.cn
- 2024-03-14
- app.group-purchasing.com
- 2024-03-14
- scholar.glgoo.org
- 2024-03-14
- en.yaodeyo.com:92
- 2024-03-14