Katz, N.H.N.H.KatzCHUN-YEN SHEN2018-09-102018-09-102008http://www.scopus.com/inward/record.url?eid=2-s2.0-50849089065&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/344278A slight improvement to garaev's sum product estimatejournal article10.1090/S0002-9939-08-09385-42-s2.0-50849089065WOS:000254675200028