@article {Liu:2019bqw,
	title = {Co-Interacting Dark Matter},
	journal = {Phys. Rev. D},
	volume = {100},
	number = {12},
	year = {2019},
	pages = {123012},
	doi = {10.1103/PhysRevD.100.123012},
	author = {Jia Liu and Wang, Xiao-Ping and Xue, Wei}
}
