TY  - GEN

T1  - Temporal and Periodic Analysis of Penumbra-Umbra Ratio for the Last Four Solar Cycles

T2  - Research Square Platform LLC

UR  - http://dx.doi.org/10.21203/rs.3.rs-3177659/v1

PY  - 2023/07/28

AU  - Chowdhury P

AU  - Kilcik A

AU  - Saha A

AU  - Rozelot J-P

AU  - Obridko V

AU  - Erdelyi R

ED  - 

DO  - DOI: 10.21203/rs.3.rs-3177659/v1

Y2  - 2024/12/26

ER  -