@misc{indiciae9a0029a5fd96, title = {Numbering system for the hammerhead.}, author = {K J Hertel and A Pardi and O C Uhlenbeck and M Koizumi and E Ohtsuka and S Uesugi and R Cedergren and F Eckstein and W L Gerlach and R Hodgson}, year = {1992}, doi = {10.1093/nar/20.12.3252}, url = {https://pubmed.ncbi.nlm.nih.gov/1620624/}, note = {Source identifier: 1620624} }