The exterior magnetic spherical multipole expansion
YU Tian, LIN Fang, YAO Xin, QI Jian-qi, ZHANG Zhi-you, NIE Ya, WANG Lei, ZHU Jian-hua
College Physics . 2022, (4): 17 .  DOI: 10.16854/j.cnki.1000-0712.210266