@article {liu2017symmetry,
	title = {Symmetry, stability, and computation of degenerate lasing modes},
	journal = {Physical Review A},
	volume = {95},
	year = {2017},
	pages = {023835},
	publisher = {APS},
	author = {Liu, David and Zhen, Bo and Ge, Li and Hernandez, Felipe and Pick, Adi and Burkhardt, Stephan and Liertzer, Matthias and Rotter, Stefan and Johnson, Steven G}
}
