7-days-to-die-v20-6-b9-2-rar
A reference to "Paper" as a craftable resource within the game, which in recent versions like V2.4 is crafted using wood debris.
While your query mentions an "interesting paper," the search results for this specific version identify it as a gaming patch rather than an academic or scientific publication. It is possible the "paper" refers to: 7-days-to-die-v20-6-b9-2-rar
This update introduced significant changes to how custom prefabs (buildings) are handled, requiring them to be placed in local folders rather than the game core. A reference to "Paper" as a craftable resource