Lang, Robert J. <br/><br/>
Origami design secrets :  mathematical methods for an ancient art / 
Robert J. Lang 
 - 2nd ed. 
 - Boca Raton, FL :  A K Peters/CRC Press,  c2012 
 - xi, 758 p. :  ill. ;  28 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9781568814360 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Origami--Design<br/>Origami--Mathematics