>> 
>> Well, its not always referred to as a KD tree in the literature, for
>> example:
>> http://www.acm.org/jgt/papers/HavranKopalBittnerZara97/
> 
> I see. They call it an "orthogonal BSP tree".
> Could you kindly send me, if you have it, an electronic version of that 
> paper (PS, PDF, any format...) or point me to a place where I can download 
> it? In the former case my address is alessandro(at)falappa(dot)net.
> 

You can download a copy at the top of the page:
http://citeseer.ist.psu.edu/havran98fast.html

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