Multiple Paper in the same bibliographic entry

Sometimes I see multiple papers having the same bibliographic entry. An example is shown in the figure below. This may be useful when referring to the papers (say connected to a certain code) that are to be cited only once and together.

How can I do that in R Markdown/Bookdown?


What is your output ? Do you want PDF ? if so you can do it with LaTeX ?

Are you targetting HTML ? In that case, I don't know if Pandoc's citeproc supports this ... it should be checked