Fix link to CCERS20 poster

pages/cv.php

@@ -133,7 +133,7 @@ $twitter_image = 'images/colopic.jpg';
 				<section id="ref-papers" class="left">
 					<h3>Refereed papers</h3>
 					<ul class="nomargin">
-						<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2020) <a href="<?=$baseurl?>files/ccers20-inequality-poster-combo" title="PDF, 1.5 MB">Effective use of mathematical equations in an online learning environment</a>. In <em>Proceedings of the Cambridge Computing Education Research Symposium 2020</em>, Cambridge, UK.</li>
+						<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2020) <a href="<?=$baseurl?>files/ccers20-inequality-poster-combo.pdf" title="PDF, 1.5 MB">Effective use of mathematical equations in an online learning environment</a>. In <em>Proceedings of the Cambridge Computing Education Research Symposium 2020</em>, Cambridge, UK.</li>
 						<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2019) <a href="<?=$baseurl?>files/las2019.pdf" title="PDF, 2 MB">Inequality: multi-modal equation entry on the web</a>. In <em>Proceedings of Learning @ Scale 2019</em>, Chicago, IL, USA.</li>
 						<li>A. Franceschini, R. Laney, C. Dobbyn (2016) <a href="<?=$baseurl?>files/met2016.pdf" title="PDF, 87 KB">Sketching music: making music through exploring art</a>. In <em>Proceedings of Sempre: Music, Education, Technology (MET2016)</em>, London, UK.</li>
 						<li>A. Franceschini, R. Laney, C. Dobbyn (2014) <a href="<?=$baseurl?>files/icmcsmc2014.pdf" title="PDF, 854 KB">Learning Musical Contour on a Tabletop</a>. In <em>Proceedings of the 40th International Computer Music Conference and 11th Sound and Music Computing Conference (ICMC-SMC)</em>, Athens, Greece.</li>

pages/writing.php

@@ -33,7 +33,7 @@ $banner_image_half = 'images/banner_writing.jpg';
 			</ul>
 			<h3>Refereed publications</h3>
 			<ul class="nomargin">
-				<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2020) <a href="<?=$baseurl?>files/ccers20-inequality-poster-combo" title="PDF, 1.5 MB">Effective use of mathematical equations in an online learning environment</a>. In <em>Proceedings of the Cambridge Computing Education Research Symposium 2020</em>, Cambridge, UK.</li>
+				<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2020) <a href="<?=$baseurl?>files/ccers20-inequality-poster-combo.pdf" title="PDF, 1.5 MB">Effective use of mathematical equations in an online learning environment</a>. In <em>Proceedings of the Cambridge Computing Education Research Symposium 2020</em>, Cambridge, UK.</li>
 				<li>A. Franceschini, J. P. Sharkey, A. R. Beresford (2019) <a href="<?=$baseurl?>files/las2019.pdf" title="PDF, 2 MB">Inequality: multi-modal equation entry on the web</a>. In <em>Proceedings of Learning @ Scale 2019</em>, Chicago, IL, USA.</li>
 				<li>A. Franceschini, R. Laney, C. Dobbyn (2016) “<a href="<?=$baseurl?>files/met2016.pdf" title="PDF, 87 KB">Sketching music: making music through exploring art</a>”. In <em>Proceedings of Sempre: Music, Education, Technology (MET2016)</em>, London, UK.</li>
 				<li>Franceschini, Andrea, Robin Laney, and Chris Dobbyn. (2014). “<a href="<?=$baseurl?>files/icmcsmc2014.pdf">Learning musical contour on a tabletop</a>”. Joint ICMC/SMC 2014, Athens, Greece.</li>