TY  - RPRT
TI  - Need for nonplanar peptide units in polypeptide chains.
AU  - G N Ramachandran
PY  - 1968
DO  - 10.1002/bip.1968.360061013
UR  - https://pubmed.ncbi.nlm.nih.gov/5685106/
ID  - 5685106
ER  -