2019 [14 March 2021]. (原始内容存档于2022-04-11). > Chesterton, Chris, Revised Calculation of Livestock Units for Higher Level Stewardship Agreements, Technical
Dunlop; C.M. Carr; Z.X. Liu; D.N. Baker; Z.Q. Chen; Y. Ji; G. Zeng. Direct calculation of the ring current distribution and magnetic structure seen by Cluster