Politis, Dionysios, George Piskas, Miltiadis Tsaligopoulos, and George Kyriafinis. 2015. “variPianoâ„¢: Visualizing Musical Diversity With a Differential Tuning Mobile Interface”. International Journal of Interactive Mobile Technologies (iJIM) 9 (3):pp. 58-63. https://doi.org/10.3991/ijim.v9i3.4472.