TY - JOUR T1 - Case studies on pre-eruptive X-class flares using R-value in the lower solar atmosphere JO - The Astrophysical Journal UR - https://eprints.whiterose.ac.uk/id/eprint/218634 UR - http://dx.doi.org/10.3847/1538-4357/ad6c33 PY - 2024/10/16 AU - Biswal S AU - Korsós MB AU - Georgoulis MK AU - Nindos A AU - Patsourakos S AU - Erdélyi R ED - DO - DOI: 10.3847/1538-4357/ad6c33 PB - American Astronomical Society VL - 974 Y2 - 2025/12/11 ER -