Almgren, Frederick J <br/><br/>
An invitation to varifold geometry / 
Frederick J.Almgren, Jr 
 - New York :  W. A. Benjamin,  1966 
 - xiii, 74 p. :  illus. (part col.) ;  22 cm. 
<br/><br/>p. 71-72. 
<br/><br/><label>LCCN: </label>66-118858 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Surfaces, Minimal<br/>Differential topology