Documentation updated (#27).

README.md

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-Implementation of `scope_guard` and `unique_resource` as proposed in [**N3949**][1].
+Implementation of `scope_guard` and `unique_resource` as proposed in [**P0052**][2] (former [N3949][1]).
 
 
 ## Compatibility
 
-This implementation conforms to [N3949][1], except:
+This implementation conforms to [P0052][2], except:
 
 ###### Namespace
 Another namespace is used instead of `std`.
 
 ## Documentation
 
+- [*P0052R3 - Generic Scope Guard and RAII Wrapper for the Standard Library*][2] (P. Sommerlad, A. L. Sandoval, E. Niebler, D. Krügler)
 - [*N3949 - Scoped Resource - Generic RAII Wrapper for the Standard Library*][1] (P. Sommerlad, A. L. Sandoval)
 
 
 
 
 [1]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2014/n3949.pdf
+[2]: http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2017/p0052r3.pdf