diff --git a/src/lib.rs b/src/lib.rs
index 60cae6f9f3..de7fd1949e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -402,18 +402,18 @@
 //! - Baker, T. P. (1991). Stack-based scheduling of realtime processes.
 //!   *Real-Time Systems*, 3(1), 67-99.
 //!
-//! > The original Stack Resource Policy paper. [PDF].
+//! > The original Stack Resource Policy paper. [PDF][srp].
 //!
-//! [PDF]: http://www.cs.fsu.edu/~baker/papers/mstacks3.pdf
+//! [srp]: http://www.cs.fsu.edu/~baker/papers/mstacks3.pdf
 //!
 //! - Eriksson, J., Häggström, F., Aittamaa, S., Kruglyak, A., & Lindgren, P.
 //!   (2013, June). Real-time for the masses, step 1: Programming API and static
 //!   priority SRP kernel primitives. In Industrial Embedded Systems (SIES),
 //!   2013 8th IEEE International Symposium on (pp. 110-113). IEEE.
 //!
-//! > A description of the RTFM task and resource model. [PDF]
+//! > A description of the RTFM task and resource model. [PDF][rtfm]
 //!
-//! [PDF]: http://www.diva-portal.org/smash/get/diva2:1005680/FULLTEXT01.pdf
+//! [rtfm]: http://www.diva-portal.org/smash/get/diva2:1005680/FULLTEXT01.pdf
 
 #![deny(missing_docs)]
 #![deny(warnings)]