[MathOuvrage]
Sums of squares of integers
/ Moreno, Carlos J. ; Wagstaff, Samuel S. Jr.
-Boca Raton FL : Chapman and Hall;CRC press, 2006. - xi, 354 p. ; 24 cm
ISBN 9781584884569
[MathOuvrage]
Cryptanalysis of number theoretic ciphers
/ Wagstaff, Samuel S. Jr.
-Boca Raton FL : Chapman and Hall;CRC press, 2002. - xv, 318 p. ; 24 cm
ISBN 9781584881537