Cata, Oscar; Cata, Oscar; Golterman, Maarten & Peris, Santiago. Unraveling duality violations in hadronic tau decays, article, March 3, 2008; (https://digital.library.unt.edu/ark:/67531/metadc899116/m1/1/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .