Update and amend the README

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@@ -151,8 +151,8 @@
 <div id="credits-and-historical-remarks" class="section level2">
 <h2 class="hasAnchor">
 <a href="#credits-and-historical-remarks" class="anchor"></a>Credits and historical remarks</h2>
-<p><code>mkin</code> would not be possible without the underlying software stack consisting of R and the packages <a href="https://cran.r-project.org/package=deSolve">deSolve</a> and <a href="https://cran.r-project.org/package=FME">FME</a>, to say the least.</p>
-<p>It could not have been written without me being introduced to regulatory fate modelling of pesticides by Adrian Gurney during my time at Harlan Laboratories Ltd (formerly RCC Ltd). <code>mkin</code> greatly profits from and largely follows the work done by the <a href="http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics">FOCUS Degradation Kinetics Workgroup</a>, as detailed in their guidance document from 2006, slightly updated in 2011 and in 2014.</p>
+<p><code>mkin</code> would not be possible without the underlying software stack consisting of R and the package <a href="https://cran.r-project.org/package=deSolve">deSolve</a>. In previous version, <code>mkin</code> was also using the functionality of the <a href="https://cran.r-project.org/package=FME">FME</a> package.</p>
+<p><code>mkin</code> could not have been written without me being introduced to regulatory fate modelling of pesticides by Adrian Gurney during my time at Harlan Laboratories Ltd (formerly RCC Ltd). <code>mkin</code> greatly profits from and largely follows the work done by the <a href="http://esdac.jrc.ec.europa.eu/projects/degradation-kinetics">FOCUS Degradation Kinetics Workgroup</a>, as detailed in their guidance document from 2006, slightly updated in 2011 and in 2014.</p>
 <p>Also, it was inspired by the first version of KinGUI developed by BayerCropScience, which is based on the MatLab runtime environment.</p>
 <p>The companion package <a href="http://kinfit.r-forge.r-project.org/kinfit_static/index.html">kinfit</a> (now deprecated) was <a href="https://r-forge.r-project.org/scm/viewvc.php?view=rev&amp;root=kinfit&amp;revision=2">started in 2008</a> and <a href="https://cran.r-project.org/src/contrib/Archive/kinfit/">first published</a> on CRAN on 01 May 2010.</p>
 <p>The first <code>mkin</code> code was <a href="https://r-forge.r-project.org/scm/viewvc.php?view=rev&amp;root=kinfit&amp;revision=8">published on 11 May 2010</a> and the <a href="https://cran.r-project.org/src/contrib/Archive/mkin">first CRAN version</a> on 18 May 2010.</p>
@@ -160,6 +160,24 @@
 <p>Somewhat in parallel, Syngenta has sponsored the development of an <code>mkin</code> and KinGUII based GUI application called CAKE, which also adds IRLS and MCMC, is more limited in the model formulation, but puts more weight on usability. CAKE is available for download from the <a href="https://www.tessella.com/showcase/computer-assisted-kinetic-evaluation">CAKE website</a>, where you can also find a zip archive of the R scripts derived from <code>mkin</code>, published under the GPL license.</p>
 <p>Finally, there is <a href="http://github.com/zhenglei-gao/KineticEval">KineticEval</a>, which contains a further development of the scripts used for KinGUII, so the different tools will hopefully be able to learn from each other in the future as well.</p>
 </div>
+<div id="references" class="section level2">
+<h2 class="hasAnchor">
+<a href="#references" class="anchor"></a>References</h2>
+<table class="table">
+<tr><td>Ranke J, Meinecke S (2019)
+  Error Models for the Kinetic Evaluation of Chemical Degradation Data
+  <i>Environments</i>
+  <b>6</b> (12) 124
+  <a href="https://doi.org/10.3390/environments6120124">doi:10.3390/environments6120124</a>
+  </td></tr>
+<tr><td>Ranke J, Wöltjen J, Meinecke S (2018)
+  Comparison of software tools for kinetic evaluation of chemical degradation data
+  <i>Environmental Sciences Europe</i>
+  <b>30</b> 17
+  <a href="https://doi.org/10.1186/s12302-018-0145-1">doi:10.1186/s12302-018-0145-1</a>
+  </td></tr>
+</table>
+</div>
 <div id="development" class="section level2">
 <h2 class="hasAnchor">
 <a href="#development" class="anchor"></a>Development</h2>