@article {Shao:2020shv,
	title = {Combined search for anisotropic birefringence in the gravitational-wave transient catalog GWTC-1},
	journal = {Phys. Rev. D},
	volume = {101},
	number = {10},
	year = {2020},
	pages = {104019},
	doi = {10.1103/PhysRevD.101.104019},
	author = {Shao, Lijing}
}
