Authors: Alfvén G, Andersson E.
Authors: Pui Yan Wong, Kin Chio Li.
Authors: Almeida D, Remelhe M, Castro H, Machado H.
Authors: Chaibou MS, Labo Madougou R, Daddy H, Dodo Siddo MN, Nanzir Sanoussi M, Gagara M, James Didier L, Younssa H, Sanoussi S, Sani R.