@misc{indiciaeae6aec9e6fdb,
  title = {Generalized Eisenstein series and non-analytic automorphic functions.},
  author = {R BELLMAN},
  year = {1950},
  doi = {10.1073/pnas.36.6.356},
  url = {https://pubmed.ncbi.nlm.nih.gov/15430310/},
  note = {Source identifier: 15430310}
}