Research - Role of audio for game immersion

Here I tried to search for materials which were were more related to audio within the immersive process as this is the focus of my project.

Two papers were added to my research list from the search:
Fundamental Components of the Gameplay Experience: Analysing Immersion. Ermi, L. & Mäyrä, F. (2005) 
[Can be accessed here: http://www.digra.org/wp-content/uploads/digital-library/06276.41516.pdf]

CAPTIVATING SOUND, THE ROLE OF AUDIO FOR IMMERSION IN COMPUTER GAMES. Huiberts, S. (2010).  
[Can be accessed here: http://download.captivatingsound.com/Sander_Huiberts_CaptivatingSound.pdf]