1
https://doie.org/10.1215/JETIR.2021510381
2
https://doie.org/10.1215/JETIR.2021644905
3
https://doie.org/10.1215/JETIR.2021899378
4
https://doie.org/10.1215/JETIR.2021794679
5
https://doie.org/10.1215/JETIR.2021211739
6
https://doie.org/10.1215/IJTSRD.2021439729
7
https://doie.org/10.1215/IJTSRD.2021854005
8
https://doie.org/10.1215/IJTSRD.2021656947
9
https://doie.org/10.1215/IJTSRD.2021141541
10
https://doie.org/10.1215/IJTSRD.2021993358