VisRef: Visual Refocusing while Thinking Improves Test-Time Scaling in Multi-Modal Large Reasoning Models. - Soumya Suvra Ghosal; Youngeun Kim; Zhuowei Li 009; Ritwick Chaudhry; Linghan Xu; Hongjing Zhang; Jakub Zablocki; Yifan Xing; Qin Zhang (CoRR, 2026)