@article {1969ApJ...158L..49D,
	title = {Stimulated Emission of Recombination Lines in H i Regions},
	journal = {\apjl},
	volume = {158},
	year = {1969},
	month = {oct},
	pages = {L49},
	doi = {10.1086/180430},
	author = {Dupree, A.~K. and Goldberg, Leo}
}
