Hi unkarc,
I will find the book "Rohde/Vendelin book: Microwave Circuit Design Using Linear and Nonlinear Techniques" with some friends or in the library. O r i will buy it.
Let me know where exactly the information lies in the book. This will help me to ask my friend to check the info when he visits university library as he is member of the same. Then i will also check with some other resources. Finally i will buy the book if it is good or useful. The price is US $79.95 is quite expensive i think.