U5 snRNA
“The uRNA database”. Nucleic Acids Research 25 (1): 102–3. (January 1997). doi:10.1093/nar/25.1.102. PMC 146409. PMID 9016512. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC146409/.
“The spliceosomal snRNAs of Caenorhabditis elegans”. Nucleic Acids Research 18 (9): 2633–42. (May 1990). doi:10.1093/nar/18.9.2633. PMC 330746. PMID 2339054. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC330746/.