[MathOuvrage]
Mathematical logic
/ Shoenfield, Joseph R..
-Reading MA : Addison-Wesley, 1967. - vii, 344 p. ; 24 cm
[MathOuvrage]
Degrees of unsolvability
/ Shoenfield, Joseph R..
-Amsterdam, New York NY : North-Holland;American Elsevier, 1971. - viii, 111 p. ; 24 cm