To listen and to watch:  

https://thevinylroom.wordpress.com/2014/10/13/interview-with-jason-a-michael-author-of-phyllis-hyman-bio/ 

https://www.youtube.com/watch?v=6bxld1YSq0M

https://www.youtube.com/watch?v=UbbKFQx81x8

https://soundcloud.com/joshjenks/an-interview-with-jason-a

https://www.youtube.com/watch?v=GfTCrHfTnZ4

To read her first biographical article in French go here:  http://www.megadiversite.com/biographies/250-un-portrait-de-la-diva-soul-phyllis-hyman.html