TY - GEN T1 - Case studies on pre-eruptive X-class flares using R-value in the lower solar atmosphere T2 - arXiv PY - 2024/08/07 AU - Biswal S AU - Korsós MB AU - Georgoulis MK AU - Nindos A AU - Patsourakos S AU - Erdélyi R ED - DO - DOI: 10.48550/arxiv.2408.04018 Y2 - 2025/12/11 ER -