References:

• Kriti - definition
  http://en.wikipedia.org/wiki/Kriti
   
• Gayaki - singing style
  http://en.wikipedia.org/wiki/Carnatic_music
   
• Purandaradasa - Father of Carnatic Music
  V.Sreenivasa Rao, Hymns and Songs of Purandara Dasaru, Bottom Dog Press, April 2004.
   
• Varisais - Graded Exercises
  A.S. Panchaapakesa Iyer, Ganamrutha Bodhini, Text Book for Carnatic Music beginner, Saralivarisai
   
• [5] Mayamalavagowlai raagam - definition
  http://en.wikipedia.org/wiki/Mayamalavagowla
   
• Octave - definition
  http://en.wikipedia.org/wiki/Octave
   
• Gaona - Online and Android karaoke singing Game
  http://www.gaonaweb.com/#!/home
   
• Shankarmahadevanacademy - Online Music Learning
  http://www.shankarmahadevanacademy.com/
   
• Shruthi – Definition in music
  http://en.wikipedia.org/wiki/Shruti_(music)
   
• Shadowing – Primary Research Technique
  Studying Actions in context: A Qualitative shadowing method for organizational research, Seonaidh McDonald
   
• “Wizard of Oz” – Prototyping and testing
  The Wizard Of Oz: A Tool For Rapid Development Of User Interfaces, Paul Green and Lisa Wei-Haas, University of Michigan, June 1985
   
• Other ragas and Akara Sadhana- Mastering singing
  The Shaping of an Ideal Carnatic Musician Through Sādhana, Pantula Rama, Gyan Publishing House, Jan-2008 pp. 167-270

Other Links:
• Useful resource e-links related to 'Interaction Design'
• Interaction Design at IDC, IIT Bombay

Case Study Download:
• Carnatic Music - Game–based Carnatic Music Lessons for Beginners......