@article {k17,
	title = {Dynamics of molecules using semigroup techniques: Vibrational line shapes in exciton models of mixed valency},
	journal = {The Journal of Chemical Physics},
	volume = {77},
	year = {1982},
	pages = {2841{\textendash}2846},
	publisher = {AIP Publishing},
	author = {Kosloff, Ronnie and Ratner, Mark A}
}
