Ali S, Leveque V, Le Pogam S, Ma H, Philipp F, Inocencio N, Smith M, Alker A, Kang H, Najera I, Klum. Selected replicon variants with low-level in vitro resistance to the hepatitis C virus NS5B polymera. Antimicrob Agents Chemother . 2008. 52(12) . 4356-4369. Find at Google Scholar.