The first article was published in the Lancet in 2004.  It describes the discovery and characteristics of NMO-IgG. 

Reprinted from the Lancet, 364, Vanda A Lennon, Dean M Wingerchuk, Thomas J Kryzer, Sean J Pittock, Claudia F Lucchinetti, Kazuo Fujihara, Ichiro Nakashima, Brian G Weinshenker,  A serum autoantibody marker of neuromyelitis optica: distinction from multiple sclerosis, 2106–12, Copyright (2004), with permission from Elsevier.