@article{PaakkariPaakkariFeuersteinetal.1992,
  author    = {P. Paakkari and I. Paakkari and G. Feuerstein and Anna-Leena Sir{\´e}n},
  title     = {Evidence for differential opioid µ\(_1\)- and µ\(_2\)-receptor regulation of heart rate in the conscious rat},
  year      = {1992},
}