Lyusternik, L.A. <br/><br/>
The Shortest Lines  
Variational Problems 
 - Moscow  Mir Publishers   1976 
 - 103 
<br/><br/><label>Publisher. No.: </label> Complimentary 
<br/><br/><label>Subjects--Personal Names: </label> Mathematics 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics