@misc{indiciaef8b592d66065,
  title = {Decrease in the number of human Ap and Ad spermatogonia and in the Ap/ Ad ratio with advancing age. New data on the spermatogonial stem cell.},
  author = {M Nistal and J Codesal and R Paniagua and L Santamaria},
  doi = {10.1002/j.1939-4640.1987.tb00950.x},
  url = {https://pubmed.ncbi.nlm.nih.gov/3583908/},
  note = {Source identifier: 3583908}
}