diff --git a/doc/kspace_style.html b/doc/kspace_style.html
index cab5f9843e..1d1c57dade 100644
--- a/doc/kspace_style.html
+++ b/doc/kspace_style.html
@@ -132,6 +132,14 @@ smaller than the reference force.
 to determine the number of K-space vectors for style <I>ewald</I> or the
 FFT grid size for style <I>pppm</I>.
 </P>
+<P>RMS force errors in real space for <I>ewald</I> and <I>pppm</I> are estimated 
+using equation 18 of <A HREF = "#Kolafa">(Kolafa)</A>, which is also referenced as 
+equation 9 of <A HREF = "#Petersen">(Petersen)</A>. RMS force errors in K-space 
+for <I>ewald</I> are estimated using equation 11 of <A HREF = "#Petersen">(Petersen)</A>,
+which is similar to equation 32 of <A HREF = "#Kolafa">(Kolafa)</A>. RMS force errors 
+in K-space for <I>pppm</I> are estimated using equation 38 of 
+<A HREF = "#Deserno">(Deserno)</A>.
+</P>
 <P>See the <A HREF = "kspace_modify.html">kspace_modify</A> command for additional
 options of the K-space solvers that can be set, including a <I>force</I>
 option for setting an absoulte RMS error in forces, as opposed to a
@@ -199,11 +207,23 @@ lj/coul</A>, <A HREF = "pair_buck.html">pair_style buck/coul/long</A>
 
 <P><B>(Darden)</B> Darden, York, Pedersen, J Chem Phys, 98, 10089 (1993).
 </P>
+<A NAME = "Deserno"></A>
+
+<P><B>(Deserno)</B> Deserno and Holm, J Chem Phys, 109, 7694 (1998).
+</P>
 <A NAME = "Hockney"></A>
 
 <P><B>(Hockney)</B> Hockney and Eastwood, Computer Simulation Using Particles,
 Adam Hilger, NY (1989).
 </P>
+<A NAME = "Kolafa"></A>
+
+<P><B>(Kolafa)</B> Kolafa and Perram, Molecular Simualtion, 9, 351 (1992).
+</P>
+<A NAME = "Petersen"></A>
+
+<P><B>(Petersen)</B> Petersen, J Chem Phys, 103, 3668 (1995).
+</P>
 <A NAME = "Pollock"></A>
 
 <P><B>(Pollock)</B> Pollock and Glosli, Comp Phys Comm, 95, 93 (1996).
diff --git a/doc/kspace_style.txt b/doc/kspace_style.txt
index e0d1079631..354da9d642 100644
--- a/doc/kspace_style.txt
+++ b/doc/kspace_style.txt
@@ -127,6 +127,14 @@ The accuracy setting is used in conjunction with the pairwise cutoff
 to determine the number of K-space vectors for style {ewald} or the
 FFT grid size for style {pppm}.
 
+RMS force errors in real space for {ewald} and {pppm} are estimated 
+using equation 18 of "(Kolafa)"_#Kolafa, which is also referenced as 
+equation 9 of "(Petersen)"_#Petersen. RMS force errors in K-space 
+for {ewald} are estimated using equation 11 of "(Petersen)"_#Petersen,
+which is similar to equation 32 of "(Kolafa)"_#Kolafa. RMS force errors 
+in K-space for {pppm} are estimated using equation 38 of 
+"(Deserno)"_#Deserno.
+
 See the "kspace_modify"_kspace_modify.html command for additional
 options of the K-space solvers that can be set, including a {force}
 option for setting an absoulte RMS error in forces, as opposed to a
@@ -193,12 +201,23 @@ kspace_style none :pre
 :link(Darden)
 [(Darden)] Darden, York, Pedersen, J Chem Phys, 98, 10089 (1993).
 
+:link(Deserno)
+[(Deserno)] Deserno and Holm, J Chem Phys, 109, 7694 (1998).
+
 :link(Hockney) 
 [(Hockney)] Hockney and Eastwood, Computer Simulation Using Particles,
 Adam Hilger, NY (1989).
 
+:link(Kolafa)
+[(Kolafa)] Kolafa and Perram, Molecular Simualtion, 9, 351 (1992).
+
+:link(Petersen)
+[(Petersen)] Petersen, J Chem Phys, 103, 3668 (1995).
+
 :link(Pollock)
 [(Pollock)] Pollock and Glosli, Comp Phys Comm, 95, 93 (1996).
 
 :link(Veld)
 [(Veld)] In 't Veld, Ismail, Grest, J Chem Phys, in press (2007).
+
+