1. Kjersti Aas and Line Eikvil. 1999. Text categorisation: A survey. Kjersti Aas and Line Eikvil. 1999. Text categorisation: A survey.
2. Helen Barlow and David Rowland. 2017. Listening to music: people practices and experiences. Helen Barlow and David Rowland. 2017. Listening to music: people practices and experiences.