Apparently, the old book "Every Woman's Guide to Self Defence" by Kathleen Hudson contains a chapter dedicated to female vs female self defense.
I found a review here: http://www.spiegel.de/spiegel/print/d-40831591.html

My German language is not that good, but i understood in a sentence that "the targets are the trachea, the carotid and the breasts of the female attacker".

Do anyone here have read this book?