diff --git a/.travis.yml b/.travis.yml
index cf64103c..61a3b72f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,9 @@
 language: python
 cache: pip
 
+#dist: precise
+sudo: false
+
 env:
   global:
     - ABINIT_VERSION=8.8.2
@@ -30,12 +33,9 @@ matrix:
       env: 
         - ABIPY_INSTALLER=pip
 
-#dist: precise
-sudo: false
 install:
-  #- sudo apt-get update
-  - env
   #- set -ev  # exit on first error, print each command
+  - env
   - ulimit -s unlimited
 
   - |
diff --git a/dev_scripts/runtests.sh b/dev_scripts/runtests.sh
index 42f55056..eec99ab5 100755
--- a/dev_scripts/runtests.sh
+++ b/dev_scripts/runtests.sh
@@ -1,5 +1,5 @@
 #!/bin/bash
-set -e  # exit on first error, print each command
+set -e  # exit on first error
 #set -ev  # exit on first error, print each command
 
 echo "PMG_MAPI_KEY: 8pkvwRLQSCVbW2Fe" > ${HOME}/.pmgrc.yaml
diff --git a/docs/installation.rst b/docs/installation.rst
index c8a8331c..aa05c980 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -15,7 +15,7 @@ the latest **stable** release that can be installed with::
     pip install abipy
 
 Note that you may need to install pymatgen_ and other critical dependencies manually.
-In this case, please consult the detailed installation instructions provided by the
+In this case, please consult the detailed installation instructions provided in the
 `pymatgen howto <http://pymatgen.org/index.html#standard-install>`_ to install pymatgen 
 and then follow the instructions in the :ref:`netcdf4_installation` section.
 
@@ -92,7 +92,7 @@ To install the pymatgen_ package from the matsci_ channel, use::
 
 then install Abipy from the abinit-channel_ with::
 
-    conda install pymatgen --channel abinit
+    conda install abipy --channel abinit
 
 Visit `materials.sh <http://materials.sh>`_ for instructions on how to use the
 matsci channel to install pymatgen and other packages.
@@ -141,7 +141,7 @@ This will allow you to push any changes to you own fork and also get them merged
 The documentation of the **developmental** version is hosted on `github pages <http://abinit.github.io/abipy>`_.
 
 The Github version include test files for complete unit testing.
-To run the suite of unit tests, make sure you have pytest_ installed and then type::
+To run the suite of unit tests, make sure you have pytest_ installed and issue::
 
     pytest
 
diff --git a/docs/refs.bib b/docs/refs.bib
index 96242062..42a3f9ae 100644
--- a/docs/refs.bib
+++ b/docs/refs.bib
@@ -278,3 +278,51 @@
  year = {1997},
  month = apr,
 }
+
+@article{Maintz2016,
+ author = {Maintz, Stefan and Deringer, Volker L. and Tchougréeff, Andrei L. and Dronskowski, Richard},
+ doi = {10.1002/jcc.24300},
+ number = {11},
+ pages = {1030-1035},
+ source = {Crossref},
+ url = {http://dx.doi.org/10.1002/jcc.24300},
+ volume = {37},
+ journal = {J. Comput. Chem.},
+ publisher = {Wiley},
+ title = {{LOBSTER:} {A} tool to extract chemical bonding from plane-wave based {DFT}},
+ subtitle = {Tool to Extract Chemical Bonding},
+ issn = {0192-8651},
+ year = {2016},
+ month = feb,
+}
+
+@article{Mostofi2014,
+ author = {Mostofi, Arash A. and Yates, Jonathan R. and Pizzi, Giovanni and Lee, Young-Su and Souza, Ivo and Vanderbilt, David and Marzari, Nicola},
+ doi = {10.1016/j.cpc.2014.05.003},
+ number = {8},
+ pages = {2309-2310},
+ source = {Crossref},
+ url = {http://dx.doi.org/10.1016/j.cpc.2014.05.003},
+ volume = {185},
+ journal = {Computer Physics Communications},
+ publisher = {Elsevier BV},
+ title = {An updated version of wannier90: {A} tool for obtaining maximally-localised Wannier functions},
+ issn = {0010-4655},
+ year = {2014},
+ month = aug,
+}
+
+@article{Setten2018,
+ author = {van Setten, M.J. and Giantomassi, M. and Bousquet, E. and Verstraete, M.J. and Hamann, D.R. and Gonze, X. and Rignanese, G.-M.},
+ doi = {10.1016/j.cpc.2018.01.012},
+ pages = {39-54},
+ source = {Crossref},
+ url = {http://dx.doi.org/10.1016/j.cpc.2018.01.012},
+ volume = {226},
+ journal = {Comput. Phys. Commun.},
+ publisher = {Elsevier BV},
+ title = {The {PseudoDojo}: {Training} and grading a 85 element optimized norm-conserving pseudopotential table},
+ issn = {0010-4655},
+ year = {2018},
+ month = may,
+}