@article{WondrakBleicher2019,
  author    = {Michael Florian Wondrak and Marcus Bleicher},
  title     = {Constraints on the string t-duality propagator from the hydrogen atom},
  journal   = {Symmetry},
  volume    = {11},
  number    = {12, Art. 1478},
  pages     = {1 -- 11},
  doi       = {10.3390/sym11121478},
  year      = {2019},
}