Computability,enumerability, unsolvability  directions in recursion theory 
ed. by S. B. Cooper, T. A. Slaman and S. S. Wainer 
 - Cambridge  Cambridge University Press  1996 
 - vii, 347p. 
 - London mathematical society lecture note series  V.224 .
<br/><br/><label>ISBN: </label>0521557364 
<br/><br/><label>Dewey Class. No.: </label>511.3  / N96