diff --git a/doc/src/Howto_bioFF.rst b/doc/src/Howto_bioFF.rst
index bac1b566e1..9bffe5d4c9 100644
--- a/doc/src/Howto_bioFF.rst
+++ b/doc/src/Howto_bioFF.rst
@@ -91,6 +91,7 @@ documentation for the formula it computes.
 * :doc:`bond_style <bond_harmonic>` harmonic
 * :doc:`bond_style <bond_morse>` morse
 
+* :doc:`angle_style <angle_cosine_squared>` cosine/squared
 * :doc:`angle_style <angle_harmonic>` harmonic
 * :doc:`angle_style <angle_cosine>` cosine
 * :doc:`angle_style <angle_cosine_periodic>` cosine/periodic
diff --git a/doc/src/angle_cosine_periodic.rst b/doc/src/angle_cosine_periodic.rst
index 61b6407eb9..ec2426154d 100644
--- a/doc/src/angle_cosine_periodic.rst
+++ b/doc/src/angle_cosine_periodic.rst
@@ -24,9 +24,8 @@ Examples
 Description
 """""""""""
 
-The *cosine/periodic* angle style uses the following potential, which
-is commonly used in the :doc:`DREIDING <Howto_bioFF>` force field,
-particularly for organometallic systems where :math:`n` = 4 might be used
+The *cosine/periodic* angle style uses the following potential, which may be
+particularly used for organometallic systems where :math:`n` = 4 might be used
 for an octahedral complex and :math:`n` = 3 might be used for a trigonal
 center:
 
@@ -36,8 +35,6 @@ center:
 
 where :math:`C`, :math:`B` and :math:`n` are coefficients defined for each angle type.
 
-See :ref:`(Mayo) <cosine-Mayo>` for a description of the DREIDING force field
-
 The following coefficients must be defined for each angle type via the
 :doc:`angle_coeff <angle_coeff>` command as in the example above, or in
 the data file or restart files read by the :doc:`read_data <read_data>`
diff --git a/doc/src/angle_cosine_squared.rst b/doc/src/angle_cosine_squared.rst
index 4a6a1debe9..d674eb61d8 100644
--- a/doc/src/angle_cosine_squared.rst
+++ b/doc/src/angle_cosine_squared.rst
@@ -30,8 +30,11 @@ The *cosine/squared* angle style uses the potential
 
    E = K [\cos(\theta) - \cos(\theta_0)]^2
 
-where :math:`\theta_0` is the equilibrium value of the angle, and :math:`K` is a
-prefactor.  Note that the usual 1/2 factor is included in :math:`K`.
+, which is commonly used in the :doc:`DREIDING <Howto_bioFF>` force field,
+where :math:`\theta_0` is the equilibrium value of the angle, and :math:`K`
+is a prefactor.  Note that the usual 1/2 factor is included in :math:`K`.
+
+See :ref:`(Mayo) <cosine-Mayo>` for a description of the DREIDING force field.
 
 The following coefficients must be defined for each angle type via the
 :doc:`angle_coeff <angle_coeff>` command as in the example above, or in
@@ -66,3 +69,10 @@ Default
 """""""
 
 none
+
+----------
+
+.. _cosine-Mayo:
+
+**(Mayo)** Mayo, Olfason, Goddard III, J Phys Chem, 94, 8897-8909
+(1990).