Diaz, J.I., et al <br/><br/>
Free boundary problems  theory & applications 
J.I. Diaz, et al 
 - England  Longman  1995 
 - 219 
 - Pitman research notes in mathematics series 323 .
<br/><br/> Nonlinear study group 
<br/><br/><label>ISBN: </label>9780582256453 
<br/><br/><label>Dewey Class. No.: </label>10.10+14.03  / DIAZ