Books in English on RSI armed forces and Black Brigades

[panzermahn]

Does anyone had any good recommendation on works in English on RSI armed forces (1943-45) as well as the Fascist Black Brigades?

I know Decima MAS has been covered in English before but I am looking more on the likes of namely the 4 divisions of RSI which are:

1st 'Italia' Bersaglieri Division
2nd 'Littorio' Infantry Division
3rd 'San Marco' Marine Division
4th 'Monterosa' Alpine Division

as well as the Battaglioni "M' Black Brigade as well as the autonomous Ettore Muti Mobile Black Brigade

Thanks