Szabo, P G., et.al. <br/><br/>
New approaches to circle packing in a square [electronic resource]   
by P G Szabo et.al. 
 - Boston  Springer  2007 
<br/><br/> http://dx.doi.org/10.1007/978-0-387-45676-8 
<br/><br/><label>ISBN: </label>9780387456768 
<br/><br/><label>Dewey Class. No.: </label>516.30285  / (e-book)