[Link 1.](http://www.stutteringtherapycentre.co.uk/blog/the-correlation-between-breathing-and-fluency.html) [Link 2.](http://psycnet.apa.org/fulltext/2014-51875-002.pdf) [Link 3](https://stutteringtreatment.org/two-great-videos-on-how-diaphragmatic-breathing-works/) There are more if you like. Not necessarily aimed at you but still, if anyone would like to read something on the issue there you go.