Asymptotic methods for wave and quantum problems  

 - Providence, R.I. :  American Mathematical Society,  2003 
 - viii, 284 p. :  ill. ;  26 cm. 
 - American Mathematical Society translations, | Advances in the mathematical sciences ;  ser. 2, v. 208 | 53 .
<br/><br/><label>ISBN: </label>821833367