Younseok Choo
      On the reciprocal sums of products of Pell numbers
      International Journal of Mathematical Analysis, Vol. 12, 2018, no. 12, 595-602
      https://doi.org/10.12988/ijma.2018.81074

Copyright © 2018 Younseok Choo. This article is distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.