@misc{indiciae64202d5bf63d,
  title = {Enkephalin receptor changes in rat brain during aging.},
  author = {V V Petkov and V D Petkov and T Grahovska and E Konstantinova},
  year = {1984},
  doi = {10.1016/0306-3623(84)90204-0},
  url = {https://pubmed.ncbi.nlm.nih.gov/6098514/},
  note = {Source identifier: 6098514}
}