erc: who: Ivanov, M. A. what: Heavy meson observables and Dyson Schwinger equations. when: 19981020 where: https://digital.library.unt.edu/ark:/67531/metadc626742/ erc-support: who: University of North Texas Libraries what: Permanent: Stable Content: when: 20081203 where: https://digital.library.unt.edu/ark:/67531/