Korobov, VladimirYelkhovsky, Alexander2004-12-032004-12-0320012001http://hdl.handle.net/2003/152110.17877/DE290R-11284enThe American Physical SocietyPhysical Review Letters530Ionization Potential of the Helium AtomVladimir Korobov10.1103/PhysRevLett.87.193003article (journal)