content_image/312489.jpg content_image/312490.jpg content_image/312491.jpg content_image/312492.jpg content_image/312493.jpg content_image/312494.jpg content_image/312495.jpg content_image/312496.jpg content_image/312487.jpg content_image/312488.jpg
where 

<img src='content_image/312489.jpg'>

<img src='content_image/312490.jpg'>

<img src='content_image/312491.jpg'>

<img src='content_image/312492.jpg'>

<img src='content_image/312493.jpg'>

<img src='content_image/312494.jpg'>

<img src='content_image/312495.jpg'>

<img src='content_image/312496.jpg'>

and z is the conjugate of z . 

Now, we shall estimate the terms I$_{k}$ , 1 ≤ k ≤ 8 , using the integration by parts and the condition z ( x, y, ± T ) = 0 . Then we have 

<img src='content_image/312487.jpg'>

In (3.14), we used the equality Re ( iz ) = − Im ( z ) and Im ( z ) − Im (¯ z ) = 2 Im ( z ), where Im ( z ) denotes the imaginary part of z ∈ C . 

<img src='content_image/312488.jpg'>

