@article{Elsner16,
  title = {On Reciprocal Sums Formed by Solutions of Pell's Equation},
  author = {Carsten Elsner},
  year = {2016},
  url = {http://math.colgate.edu/~integers/q88/q88.Abstract.html},
  researchr = {https://researchr.org/publication/Elsner16},
  cites = {0},
  citedby = {0},
  journal = {Integers},
  volume = {16},
}