diff --git a/docs/source/methods/physics.rst b/docs/source/methods/physics.rst
index 55051d5979..54dc913455 100644
--- a/docs/source/methods/physics.rst
+++ b/docs/source/methods/physics.rst
@@ -997,14 +997,9 @@ Carlo code, it must be done in such a way that preserves the thermally-averaged
 reaction rate as per equation :eq:`doppler-broaden`.
 
 The method by which most Monte Carlo codes sample the target velocity for use in
-elastic scattering kinematics is outlined in detail by [Gelbard]_. This is the
-default method for sampling target velocities in OpenMC.  Alternate methods for 
-treating thermal target motion which reproduce the exact elastic scattering kernel
-have been implemented in OpenMC and are described by [Walsh]_.
-
-Here, the derivation of the default method largely follows that of Gelbard. Let
-us first write the reaction rate as a function of the velocity of the target 
-nucleus:
+elastic scattering kinematics is outlined in detail by [Gelbard]_. The
+derivation here largely follows that of Gelbard. Let us first write the reaction
+rate as a function of the velocity of the target nucleus:
 
 .. math::
     :label: reaction-rate
@@ -1564,10 +1559,6 @@ References
 
 .. [Gelbard] Ely M. Gelbard, "Epithermal Scattering in VIM," FRA-TM-123, Argonne
    National Laboratory (1979).
-   
-.. [Walsh] Jonathan A. Walsh, Benoit Forget, and Kord S. Smith, "Accelerated 
-   sampling of the free gas resonance elastic scattering kernel," *Ann. Nucl. 
-   Energy*, **69**, 116-124 (2014). http://dx.doi.org/10.1016/j.anucene.2014.01.017
 
 .. [Levitt] Leo B. Levitt, "The Probability Table Method for Treating Unresolved
    Neutron Resonances in Monte Carlo Calculations," *Nucl. Sci. Eng.*, **49**,