diff --git a/NEWS.md b/NEWS.md
index efff3c79..e83c6213 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,9 +1,10 @@
-# aqp 2.0.3 (2024-04-09)
+# aqp 2.0.3 (2024-04-17)
+ * CRAN release
  * `simulateColor()` gains new method `mvnorm` for simulating plausible colors
    - package mvtnorm added to SUGGESTS
  * performance improvements in `profileInformationIndex()`, `dice()`, `slab()`, `spc2mpspline()`, `fillHzGaps()`, and `flagOverlappingHz()`
  * aesthetic improvements in `huePositionCircle()`
- * new function `thicknessOf()` used for calculating thickness of horizons within each profile of a SoilProfileCollection based on horizon-level logical expressions encoded in a function. Default behavior uses pattern matching on the horizon designation name.
+ * new function `thicknessOf()` used for calculating thickness of horizons within each profile of a `SoilProfileCollection` based on horizon-level logical expressions encoded in a function. Default behavior uses pattern matching on the horizon designation name.
 
 # aqp 2.0.2 (2023-11-18)
  * CRAN release
diff --git a/README.Rmd b/README.Rmd
index 26e2fa4e..7ead3308 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -49,7 +49,7 @@ Install suggested packages:
 p <- c("colorspace", "ape", "soilDB", "latticeExtra", "tactile", "compositions", 
 "sharpshootR", "markovchain", "xtable", "testthat", "Gmedian", 
 "farver", "Hmisc", "tibble", "RColorBrewer", "scales", "digest", 
-"MASS", "mpspline2", "soiltexture", "knitr", "rmarkdown")
+"MASS", "mpspline2", "soiltexture", "knitr", "rmarkdown", "mvtnorm")
 
 install.packages(p)
 ```
@@ -94,6 +94,11 @@ plotSPC(
 citation("aqp")
 ```
 
+## Related Papers and Book Chapters
+  * Beaudette D.E., P. Roudier, and J. Skovlin. 2016. Probabilistic representation of genetic soil horizons. In Book Digital soil morphometrics. Springer.
+  * Maynard, J.J., S.W. Salley, D.E. Beaudette, and J.E. Herrick. 2020. Numerical soil classification supports soil identification by citizen scientists using limited, simple soil observations. Soil Science Society of  America Journal 84:1675-1692.
+  * Beaudette, D. E., J. Skovlin, A. G. Brown, P. Roudier, and S. M. Roecker. "Algorithms for Quantitative Pedology." In Geopedology, edited by Joseph Alfred Zinck, Graciela Metternicht, Héctor Francisco del Valle, and Marcos Angelini, 201–22. Cham: Springer International Publishing, 2023. https://doi.org/10.1007/978-3-031-20667-2_11.
+
 ## Related Packages
   * [soilDB](https://github.com/ncss-tech/soilDB)
   * [sharpshootR](https://github.com/ncss-tech/sharpshootR)
@@ -102,7 +107,7 @@ citation("aqp")
   * [Introduction to SoilProfileCollection Objects](https://ncss-tech.github.io/aqp/articles/Introduction-to-SoilProfileCollection-Objects.html)
   * [Numerical Classification of Soil Profiles](https://ncss-tech.github.io/aqp/articles/NCSP.html)
   * [Overlapping Annotation](https://ncss-tech.github.io/aqp/articles/label-placement.html)
-  * [What is new in aqp 2.0?](https://ncss-tech.github.io/aqp/articles/new-in-aqp-2.html)
+  * [What is new in aqp 2.x?](https://ncss-tech.github.io/aqp/articles/new-in-aqp-2.html)
 
 ## Tutorials
   * [Soil Profile Sketches](https://ncss-tech.github.io/AQP/aqp/sketches.html)
diff --git a/README.md b/README.md
index 8a2e2b37..ecdcc90b 100644
--- a/README.md
+++ b/README.md
@@ -117,6 +117,21 @@ citation("aqp")
 #> 'options(citation.bibtex.max=999)'.
 ```
 
+## Related Papers and Book Chapters
+
+- Beaudette D.E., P. Roudier, and J. Skovlin. 2016. Probabilistic
+  representation of genetic soil horizons. In Book Digital soil
+  morphometrics. Springer.
+- Maynard, J.J., S.W. Salley, D.E. Beaudette, and J.E. Herrick. 2020.
+  Numerical soil classification supports soil identification by citizen
+  scientists using limited, simple soil observations. Soil Science
+  Society of America Journal 84:1675-1692.
+- Beaudette, D. E., J. Skovlin, A. G. Brown, P. Roudier, and S. M.
+  Roecker. “Algorithms for Quantitative Pedology.” In Geopedology,
+  edited by Joseph Alfred Zinck, Graciela Metternicht, Héctor Francisco
+  del Valle, and Marcos Angelini, 201–22. Cham: Springer International
+  Publishing, 2023. <https://doi.org/10.1007/978-3-031-20667-2_11>.
+
 ## Related Packages
 
 - [soilDB](https://github.com/ncss-tech/soilDB)
@@ -131,7 +146,7 @@ citation("aqp")
 - [Overlapping
   Annotation](https://ncss-tech.github.io/aqp/articles/label-placement.html)
 - [What is new in aqp
-  2.0?](https://ncss-tech.github.io/aqp/articles/new-in-aqp-2.html)
+  2.x?](https://ncss-tech.github.io/aqp/articles/new-in-aqp-2.html)
 
 ## Tutorials
 
diff --git a/man/aqp-package.Rd b/man/aqp-package.Rd
index 1588cf56..5f42665e 100644
--- a/man/aqp-package.Rd
+++ b/man/aqp-package.Rd
@@ -3,7 +3,6 @@
 \docType{package}
 \name{aqp-package}
 \alias{aqp-package}
-\alias{_PACKAGE}
 \alias{aqp}
 \alias{aqp.env}
 \title{Algorithms for Quantitative Pedology}