Dear all,
<div><br></div><div>Thank you very much for your discussion, and sorry if I was confusing. Thank you for your suggestions, I solved my problem now. </div><div>@Eelke for the global field power I meant this <a href="http://www.sciencedirect.com/science/article/pii/0301008284900030">http://www.sciencedirect.com/science/article/pii/0301008284900030</a> page 235. Thank you very much for you effort!</div>
<div><br></div><div>All the best!</div><div><br></div><div>Nenad</div>