If "solid paper" refers to a specific material or academic journal, it is likely unrelated to the musical topic provided.
Regarding your mention of , there is no direct link between Keba's music and a specific academic or industrial "solid paper" product or research in the current search data. It is possible you are looking for:
Hard copies or "papers" containing the musical notation for this specific live arrangement.
A high-quality live recording of the song on YouTube or Spotify.