@article { ISI:A1970G453800004,
	title = {DETERMINATION OF PHASE OF SCATTERING AMPLITUDE FROM DIFFERENTIAL CROSS SECTION},
	journal = {PHYSICAL REVIEW D},
	volume = {1},
	year = {1970},
	pages = {998-\&},
	issn = {0556-2821},
	doi = {10.1103/PhysRevD.1.998},
	author = {Gerber, R. B. and Karplus, M.}
}
