[Advaita-l] darshanas - older and later

[Gopal]

Namaste,

Hopefully this is not a question that has been discussed before..

Could someone kindly point me to texts and sources that describe how the
three vedantic schools borrowed from older darshanas in formulating hindu
dharmic traditions as we know now? I am looking for information on the
continuity of thought among darshanas and subsequent religious traditions.

thanks
..gopal gopinath