BPG is committed to discovery and dissemination of knowledge
Total Visits of This Article
2021 | Number of total visits
Rank Countries/Territories Count Percent
1 United States 11 44%
2 Russia 4 16%
3 China 3 12%
4 Germany 2 8%
5 Hong Kong 2 8%
6 Netherlands 2 8%
7 Taiwan 1 4%