[1]
E. Ley Koo, A. Góngora T., and H. Torres Bustamante, “Addendum to complete electromagnetic multipole expansion including toroidal moments Rev. Mex. Fis E 52 (2006) 188-197”, Rev. Mex. Fis. E, vol. 17, no. 2 Jul-Dec, pp. 138–140, Jul. 2020.