Melnikov, KirillYelkhovsky, Alexander2004-12-102004-12-1020012001http://hdl.handle.net/2003/1841310.17877/DE290R-12261enThe American Physical SocietyPhysical Review Letters530[script O](alpha^3 lnalpha) Corrections to Muonium and Positronium Hyperfine Splitting10.1103/PhysRevLett.86.1498article (journal)