If you are looking for physical papers or documents to "develop" or collect for quests, here are the most relevant items:

: A specific quest item that players often find difficult to locate, essential for progressing certain medical-related side objectives.

: In the quest "The Ritual," you must find Marcus' notes hidden behind a picture in Mataka Village to advance the story.

: It explored how early tribal religions and practices were influenced by the disease.

: The scientists studied the effects of this disease on the indigenous population of Palanai.

: You interact with Dr. Kessler in the BioSphere (Chapter 4), where he provides background on the virus mutations based on his years of research with the WHO.

: Located in the Henderson Military Base west of the cinema. It is one of the 9 Secret Files required for "The Collector" or "The Hoarder" achievements.

In Dead Island: Riptide , the phrase "develop a paper" most likely refers to the written by the researchers Dr. Kessler and Dr. Villa, which is a key piece of lore found within the game's collectible Secret Files . The Kessler-Villa Paper