Xiang, Y.; Cao, L.; Conesa-Boj, S.; Estrade, S.; Arbiol, J.; Peiro, F.; Hei, M.; Zardo, I.; Morante, J.R.; Brongersma, M.L.; Fontcuberta, A. "Single crystalline and core-shell indium-catalyzed germanium nanowires – A systematic thermal CVD growth study" Nanotechnology 20, 24, pp. - 2009 DOI: 10.1088/0957-4484/20/24/245608