Localization of five-dimensional Elko spinors with non-minimal coupling on thick branes Xiang-Nan Zhou, Yun-Zhi Du, Zhen-Hua Zhao and Yu-Xiao Liu Eur. Phys. J. C, 78 6 (2018) 493 Published online: 13 June 2018 DOI: 10.1140/epjc/s10052-018-5971-1