Copy and paste this link:
http://journals.cambridge.org/action/displayAbstract?aid=433845
Copy and paste this citation
JEREMY GIBBONS,
DAVID LESTER
and RICHARD BIRD
(2006).
FUNCTIONAL PEARL: Enumerating the rationals. Journal of Functional Programming, 16
,
pp 281-291
doi:10.1017/S0956796806005880