@misc{indiciae6fb072136eba,
  title = {Need for nonplanar peptide units in polypeptide chains.},
  author = {G N Ramachandran},
  year = {1968},
  doi = {10.1002/bip.1968.360061013},
  url = {https://pubmed.ncbi.nlm.nih.gov/5685106/},
  note = {Source identifier: 5685106}
}