@article { ISI:A1969E338200052,
	title = {UPPER BOUNDS ON MANY-CHANNEL SCATTERING PHASE SHIFTS BY AN ADIABATIC-TYPE APPROXIMATION},
	journal = {JOURNAL OF CHEMICAL PHYSICS},
	volume = {51},
	year = {1969},
	pages = {2726+},
	issn = {0021-9606},
	doi = {10.1063/1.1672397},
	author = {Gerber, R. B. and Karplus, M.}
}
