Songwriting basics: how to use diminished 7ths to spice up your chord progressions | MusicRadar
https://www.musicradar.com/how-to/songwriting-basics-how-to-use-diminished-7ths-to-spice-up-your-chord-progressions
https://www.musicradar.com/how-to/songwriting-basics-how-to-use-diminished-7ths-to-spice-up-your-chord-progressions