@article{19213,
  author       = {{Ahmadov, A.I. and Aslanova, S.M. and Orujova, M.Sh. and Badalov, S.V. and Dong, Shi-Hai}},
  issn         = {{0375-9601}},
  journal      = {{Physics Letters A}},
  number       = {{24}},
  pages        = {{3010--3017}},
  publisher    = {{Elsevier}},
  title        = {{{Approximate bound state solutions of the Klein-Gordon equation with the linear combination of Hulthén and Yukawa potentials}}},
  doi          = {{10.1016/j.physleta.2019.06.043}},
  volume       = {{383}},
  year         = {{2019}},
}

@article{13788,
  author       = {{Schmidt, Wolf Gero and Verwoerd, W.S}},
  issn         = {{0375-9601}},
  journal      = {{Physics Letters A}},
  number       = {{4}},
  pages        = {{275--280}},
  title        = {{{Annihilation of delocalized positrons: a comparison of diamond and silicon}}},
  doi          = {{10.1016/0375-9601(96)00653-6}},
  volume       = {{222}},
  year         = {{1996}},
}