PubMed abstracts include references when available. Reference lists are available for citations to full-text articles included in PMC and for citations where the publisher supplied references in the citation data sent to PubMed.
PubMed abstracts include links to other resources citing the current resource. The "Cited by" citation list is generated using data submitted by publishers and from NCBI resources, when available. The resources included in "Cited by" may not be a complete list of works citing a particular resource.