Theoritical basics of the harmonic balance

I need some document from the theoritical basics of the harmonic balance simulation method.

Thanks,

You can look into the book "Nonlinear Microwave and RF Circuits"written by Steve Maas.

Hi,

this is also good one:

F. Giannini, G. Leuzzi ?
Nonlinear Microwave Circuit Design, John Wiley & Sons, 2004

flyhigh

Maas book is a very good book, but I em thinking about
what difference is between Maas's two book: Nonlinear Microwave Circuits and Nonlinear Microwave and RF Circuits? So, I have the book : Nonlinear Microwave and RF Circuits. Does it worth obtain the other book. So are there in Nonlinear Microwave Circuits any new information?