diff --git a/opensym2017/content/03-requirements.tex b/opensym2017/content/03-requirements.tex
index 6eb12ed..b12de25 100644
--- a/opensym2017/content/03-requirements.tex
+++ b/opensym2017/content/03-requirements.tex
@@ -79,31 +79,31 @@ trivial work.
 The new SPB platform is fully an integrated environment, as we can see in
 Figure \ref{fig:requirements}, being very advanced comparing to other related
 projects and initiatives. For example, the USA government has a platform
-designed to improve access to the federal government developed software.
-Code.gov is an interface to organize the USA government projects and, in short,
-make easy that their users and developers obtain some information and access
-their source code repositories at GitHub. However, there are not social
-networking and CMS features, as well as, other communication resources provided
-by that platform.
-%https://code.gov
-
-Also, there are two initiatives in Europe: OSOR and OW2. The Open Source
-Observatory (OSOR) is a community hosted in the JoinUp platform powereded by
-the European Commission. OSOR aims exchanging information, experiences and best
-practices around FOSS solutions for use in public administrations. Summarily,
-it helps to find a FOSS made available by other public administrations,
-providing access to information such as news, events, studies and solutions
-related to implementation of open source software. It also offers forum
-discussions and community mailing lists, but it does not have an integrated
-source code repository manager and for the each project has a link to its own
-external repository (or its tarball file).
-%https://joinup.ec.europa.eu/community/osor
+designed to improve access to the federal government developed
+software\footnote{\url{https://code.gov}.  Code.gov is an interface to organize
+the USA government projects and, in short, make easy that their users and
+developers obtain some information and access their source code repositories at
+GitHub. However, there are not social networking and CMS features, as well as,
+other communication resources provided by that platform.
+
+Also, there are two initiatives in Europe:
+OSOR\footnote{\url{https://joinup.ec.europa.eu/community/osor} and
+OW2\footnote{\url{http://ow2.org}}. The Open Source Observatory (OSOR) is a
+community hosted in the JoinUp platform powereded by the European Commission.
+OSOR aims exchanging information, experiences and best practices around FOSS
+solutions for use in public administrations. Summarily, it helps to find a FOSS
+made available by other public administrations, providing access to information
+such as news, events, studies and solutions related to implementation of open
+source software. It also offers forum discussions and community mailing lists,
+but it does not have an integrated source code repository manager and for the
+each project has a link to its own external repository (or its tarball file).
+%
 OW2 is a FOSS community to promote the development of FOSS middleware, generic
 business applications, cloud computing platforms and foster a community and
 business ecosystem. In short, it aims to support the development, deployment
 and management of distributed applications with a focus on FOSS middleware and
 related development and management tools.
-%http://ow2.org
+%
 Moreover, from the European Commission in 2007 until 20011, there were the
 QualiPSo project that aims to provide to FOSS users, developers, and consumers,
 quality resources and expertise on the various topics related to FOSS. The
@@ -111,14 +111,15 @@ QualiPSo project also had planned to develop a platform called QualiPSo
 Factory but it was not fully completed.
 
 In Latin American has an initiative based on the SPB project called Software
-Publico Regional. From the practical point of view, it provides a customized
-Gitlab instance to share the source code and documentation of the project from
-the involved countries.
-%http://softwarepublicoregionalbeta.net/
-Such as Brazil, Chile has its own portal also called Software Publico. The user
-can create content in the communities (news items, documents, wiki pages), but
-all repository is available at the Bitbucket platform.
-%http://www.softwarepublico.gob.cl -> https://bitbucket.org/softwarepublico
+Publico Regional\footnote{\url{http://softwarepublicoregionalbeta.net}}. From
+the practical point of view, it provides a customized Gitlab instance to share
+the source code and documentation of the project from the involved countries.
+%
+Such as Brazil, Chile has its own portal also called Software
+Publico\footnote{\url{http://www.softwarepublico.gob.cl}}. The user can create
+content in the communities (news items, documents, wiki pages), but all
+repository is available at the Bitbucket
+platform\footnote{\url{https://bitbucket.org/softwarepublico}}.
 
 The Brazilian government needed to evolute the SPB project that exists since
 2005. In 2013, when we started this project, the SPB Portal had about 200
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