diff --git a/.travis.yml b/.travis.yml
index 4585c6d..813c89d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -2,6 +2,11 @@ sudo: required
 dist: trusty
 language: fortran
 
+branches:
+  only:
+    - master
+    - devel
+
 matrix:
   include:
     - os: linux
diff --git a/README.md b/README.md
index 5015328..66193ed 100644
--- a/README.md
+++ b/README.md
@@ -3,9 +3,9 @@
 Copyright (2002-2016) Regents of the University of Minnesota
 
 PSCF is a Fortran 90 program for numerically solving the polymer
-self-consistent field theory for periodic microstructures formed
-by incompressible melts or mixtures of linear block copolymers,
-linear homopolymers, and small molecule solvents.
+self-consistent field theory (SCFT) for spatially periodic structures 
+formed by block copolymer melts and mixtures of block copolymers with
+linear homopolymers and/or small molecule solvents.
 
 This program is free software; you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -23,15 +23,13 @@ the LICENSE file in the top-level PSCF directory.
 
 # Dependencies
 
- PSCF depends upon the FFTW fast Fourier transform library and the
- LAPACK linear algebra library.  These packages must be installed
- before attempting to compile the program from source.
+PSCF depends upon the FFTW fast Fourier transform library and the
+LAPACK linear algebra library.  These packages must be installed
+before attempting to compile the program from source.
 
 # User Documentation
 
-A web user manual is avalaible at:
-
-    https://pscf.readthedocs.io
+A web user manual is available at https://pscf.readthedocs.io
 
 Instructions for compiling the program from source, as well as various
 ways to install precompiled executables, are given in the user manual.
@@ -39,35 +37,57 @@ ways to install precompiled executables, are given in the user manual.
 The source files for the user manual are text files that are stored in
 the doc/user-man directory. The relevant files have file extension .rst.
 
+We also recommend that users refer to the 2016 reference article from the 
+journal Macromolecules, cited below. This article provides a brief introduction 
+to SCFT, discusses some of the algorithms and file formats used in the PSCF 
+program, and discusses some issues and questions faced by first time users.
+
 # Developer Documentation
 
 A local copy of the developer API documentation, which includes
 documentation for all modules, subroutines and public variables, may
 be regenerated by following instructions given in the file doc/README.
-The resulting .html page are installed in doc/devel-man.
+The resulting html pages are installed in the doc/devel-man directory.
 
-# Directory Structure
+# Reference Article 
 
-    src/                          - Fortran 90 source files
-    doc/                          - documentation files
-    doc/user-man                  - - user manual source files
-    tools/                        - Tools for processing output and source
-    tools/matlab                  - - matlab scripts for visualization
-    tools/python                  - - python modules
-    make/                         - build directory for make
+If you use PSCF in published work, we request that you cite the paper:
 
-An annotated list of source files is given in the file src/SRC_FILES.
-Before modifying any fortran files, see the note at the end of that
-file regarding the use of preprocessor to generate some files.
+"Broadly Accessible Self-Consistent Field Theory for Block Copolymer
+Materials Discovery", A. Arora, J. Qin, D.C. Morse, K.T. Delaney,
+G.H. Fredrickson, F.S. Bates and K.D. Dorfman, 
+Macromolecules 49, 4675 (2016)
+
+available electronically at http://pubs.acs.org/doi/10.1021/acs.macromol.6b00107
 
 # Examples
 
 A library of examples is provided in a separate github repository,
 located at https://github.com/dmorse/pscf-examples
 
+# Links
+
+  - Home Page:    https://morse.cems.umn.edu/morse/code/pscf/home.php.html
+  - Source Code:  https://github.com/dmorse/pscf
+  - CI Server:    https://travis-ci.org/dmorse/pscf
+  - Manual:       https://pscf.readthedocs.io
 
 [buildstatus_image_travis]: https://travis-ci.org/dmorse/pscf.svg?branch=master
 [travisci]: https://travis-ci.org/dmorse/pscf
 
 [![Travis][buildstatus_image_travis]][travisci]
 
+# Repository Directory Structure
+
+    src/                          - Fortran 90 source files
+    doc/                          - documentation files
+    doc/user-man                  - - user manual source files
+    tools/                        - Tools for processing output and source
+    tools/matlab                  - - matlab scripts for visualization
+    tools/python                  - - python modules
+    make/                         - build directory for make
+
+An annotated list of source files is given in the file src/SRC_FILES.
+Before modifying any fortran files, see the note at the end of that
+file regarding the use of preprocessor to generate some files.
+