1Gehen S.Purification of a nerve-growth promoting protein from the mouse salivary gland and its neuro-cytotoxic antiserum.Pro Natl Sci USA.1960,46:302-311.
2Cobens.Metabolic control mechanism in animal celts.Rafter WJ,Ed.NationalCancer Institute Monograph,1964:13-27.
3Gxegory H.Isolation and structure of urogastrone and its relatiouship to epidermal growt facter.Nature,1975,257:325-327.