This code system http://hl7.org/fhir/citation-classification-type defines the following codes:

CodeDisplayDefinition
citation-source Citation SourceCitation repository where this citation was created or copied from
medline-owner MEDLINE Citation OwnerThe party responsible for creating and validating the MEDLINE citation
fevir-platform-use FEvIR Platform UseUsed for Citation sharing on the Fast Evidence Interoperability Resources (FEvIR) Platform
<status value="active"/><experimental value="false"/><date value="2021-03-11T10:55:11.085+11:00"/><publisher value="HL7 (FHIR Project)"/><contact><telecom><system value="url"/><value value="http://hl7.org/fhir"/></telecom><telecom><system value="email"/><value value="fhir@lists.hl7.org"/></telecom></contact><description value="Citation classification type"/><jurisdiction><coding><system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/><code value="001"/><display value="World"/></coding></jurisdiction><caseSensitive value="true"/><valueSet value="http://hl7.org/fhir/ValueSet/citation-classification-type"/><content value="complete"/><concept><code value="citation-source"/><display value="Citation Source"/><definition value="Citation repository where this citation was created or copied from"/></concept><concept><code value="medline-owner"/><display value="MEDLINE Citation Owner"/><definition value="The party responsible for creating and validating the MEDLINE citation"/></concept><concept><code value="fevir-platform-use"/><display value="FEvIR Platform Use"/><definition value="Used for Citation sharing on the Fast Evidence Interoperability Resources (FEvIR) Platform"/></concept></CodeSystem>