Non-linear evolution equations solvable by the spectral transform   
ed. by F.Calogero 
 - London  Pitman  1977 
 - xvii, 256p. 
 - Research Notes in Mathematics  26 .
<br/><br/><label>ISBN: </label>0 273 08402 X 
<br/><br/><label>Dewey Class. No.: </label>515.35  / N786