https://ctan.org/pkg/opcit?lang=en
CTAN: Package opcit
ctanpackage
https://www.ctan.org/ctan-ann/pkg/opcit
CTAN: CTAN-ann - opcit
ctanann
https://collections.monash.edu/nodes/view/81632
76 OpCIT: Orientation Programme CIT [library copy] | Monash Uni
Item date: 1976 | Item identifier: 1994/01 Item 687 | Series: MON636 | Read the full record details for Item: 76 OpCIT: Orientation Programme CIT [library copy]
orientation programmecitlibrarycopymonash
https://ftp.math.utah.edu/pub/tex-archive/macros/latex2e/contrib/opcit/?C=N;O=D
Index of /pub/tex-archive/macros/latex2e/contrib/opcit
index ofpubtexarchivemacros
https://web-archive.southampton.ac.uk/opcit.eprints.org/proposal.html
Open Citation (OpCit) Project Proposal
opencitationprojectproposal
https://ctan.org/ctan-ann/id/1158858255.4502.20.camel@alan.smcvt.edu?lang=de
CTAN: CTAN-ann - CTAN package update: opcit
ctanannpackageupdate