The research:

Christie, W. (2018). An Investigation of Parents’ and Children’s Perceptions of Applying ‘Orff-Schulwerk’ Approaches to Children’s Private Piano Lessons  The University of Waikato, Hamilton, New Zealand. Retrieved from https://hdl.handle.net/10289/12135

Nussbaum, M. C. (2009). Education for profit, education for freedom. Liberal Education 95, 6–13.

Ulvik, M. (2020, April). Promoting aesthetical values to education. In Frontiers in Education (Vol. 5, p. 34). Frontiers Media SA.