@article {237,
	title = {Excitonic gain and laser emission from mixed-cation halide perovskite thin films},
	journal = {Optica},
	volume = {5},
	year = {2018},
	pages = {1141{\textendash}1149},
	doi = {https://doi.org/10.1364/OPTICA.5.001141},
	url = {https://doi.org/10.1364/OPTICA.5.001141},
	author = {Chen, Songtao and Nurmikko, Arto}
}
