@article {9999,
	title = {Topological invariants of metals and the related physical effects},
	journal = {Chinese Physics Letters},
	year = {2013},
	doi = {10.1088/0256-307X/30/2/027101},
	author = {Jian-Hui Zhou and Hua Jiang and Qian Niu and Jun-Ren Shi}
}
