:
: 90
: 2021
: : . . 90. .: , 2021. 138 .
:
1. .. // . 90. .: , 2021. .5-35. DOI: https://doi.org/10.25728/ubs.2021.90.1
2. .. // . 90. .: , 2021. .36-48. DOI: https://doi.org/10.25728/ubs.2021.90.2
3. .. : // . 90. .: , 2021. .49-66. DOI: https://doi.org/10.25728/ubs.2021.90.3
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4. .. // . 90. .: , 2021. .67-93. DOI: https://doi.org/10.25728/ubs.2021.90.4
5. .., .., .. // . 90. .: , 2021. .24-120. DOI: https://doi.org/10.25728/ubs.2021.90.5
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6. .., .., .. // . 90. .: , 2021. .121-138. DOI: https://doi.org/10.25728/ubs.2021.90.6
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