The toroidal curvatures of interplanetary coronal mass ejection flux ropes from multi-point observations - Lai, H. R.; Jia, Y.-D.; Jian, L. K.; Russell, C. T.; Blanco-Cano, X.; Luhmann, J. G.; Chen, C. Z.; Cui, J. (Frontiers in Astronomy and Space Sciences, 2024)