@article {AmbroseSS91,
	title = {Persistent infrared spectral hole burning of {NO}2- ions in potassium halide crystals .1. Principle and satellite hole generation},
	journal = {Journal Of Chemical Physics},
	volume = {95},
	year = {1991},
	pages = {8816-8842},
	author = {Ambrose, W. P. and Sethna, J. P. and Sievers, A. J.}
}
