Does someone know of any good papers/books/references of properties of the so-called "Zassenhaus Filtration" of a group $G$ ?
I'm mainly interested in relations between this filtration and closely related ones such as the lower central series (which I actually already found ) , the derived series, etc...
Any good reference will be greatfully acknowledged! I really need to know some properties of this filtration, but can't find any good book/paper that contains such
Thanks in advance !