1.5 months
3.3 months
n/a
2.5 rounds
2.5 reports
difficult
1.6 months
2.5 months
121 days
2.0 rounds
2.0 reports
easy
3.7 months
9.1 months
n/a
3.0 rounds
2.0 reports
moderate
6.0 months
7.4 months
n/a
2.0 rounds
2.0 reports
effortless
8.7 months
14.2 months
n/a
2.0 rounds
2.0 reports
moderate
1.5 months
1.6 months
n/a
2.0 rounds
3.0 reports
very difficult
1.7 months
3.6 months
n/a
2.0 rounds
2.0 reports
very easy
n/a
n/a
11 days
n/a
n/a
n/a
n/a
n/a
3.8 months
4.9 months
n/a
2.0 rounds
1.0 reports
difficult
2.0 months
4.0 months
n/a
2.0 rounds
3.0 reports
very easy
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology)
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a
n/a