@misc{indiciaece4366ae089b,
  title = {Energy transfer in mixed lanthanide complexes.},
  author = {Bjorklund, S. and Filipescu, N. and Hurt, C. R. and Mcavoy, N.},
  year = {1967},
  url = {https://ntrs.nasa.gov/citations/19670062018},
  note = {Source identifier: 19670062018}
}