CSTAR? I've gone to far down a rabbit hole.

https://

www.google.com/url?sa=t&source=web&rct=j&url=https:// arxiv.org/pdf/1001.4951&ved=2ahUKEwi0lrfYtbrZAhWyTd8KHdDrCwYQFjAQegQIABAB&usg=AOvVaw0uz8pIl2ffN_fe3tCVzX_Z