Marino, A & Venkateshamurthy, M.K <br/><br/>
Nonlinear variational problems. Vol II 
Ed by A. Marino & M.K. Venkateshamurthy 
 - Essex  Longman  1989 
 - 211 
 - Pitman research notes in mathematics series 193 .
<br/><br/><label>ISBN: </label>9780582018624 
<br/><br/><label>Dewey Class. No.: </label>6.03  / MARI