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1. Characterization of copper-manganese mixed oxides
P. Porta, G. Moretti, M. Musicanti, A. Nardella
Volume 9, Issues 1-2, 26 March 1991, Pages 211-218

DOI:

http://dx.doi.org/[color=#0000BF]10.1016/0920-5861(91)85026-5 [/color]

2. First direct evidence of a solid state charge transfer redox system Cu+2 + Mn3+ ⇋ Cu1+ + Mn4+in copper manganese oxide
D.L. Cocke∗, S. Vepřek
Volume 57, Issue 9, March 1986, Pages 745-748

DOI:

http://dx.doi.org/[color=#0000BF]10.1016/0038-1098(86)90851-3[/color]