Double links on papers

Describe the bug I wanted to complete the SAM-IoT agenda by adding the links to accepted papers. Knowing we don't have a specific slot (such as vod: or slides:) for papers, I added directly the link in the description, just below the authors. For example:

- name: 'Risk Assessment in IoT Case Study: Collaborative Robots System'
  presenter: <a href="speakers/#salim-chehida">Salim Chehida</a>
  type: session
  time: 13:45 - 14:05
  abstract: |
         <p><strong>Authors:</strong>
         <ul>
              <li>Salim Chehida, Université Grenoble Alpes</li>
              <li>Abdelhakim Baouya, Université Grenoble Alpes</li>
              <li>Miquel Cantero, Robotnik Automation S.L.L</li>
              <li>Paul-Emmanuel Brun, Airbus Defence & Space</li>
              <li>Guillemette Massot, Airbus Defence & Space</li>
         </ul>
         <strong>Paper:</strong> <a target="_blank" href="http://ceur-ws.org/Vol-2739/paper_1.pdf">CEUR link</a>
         
         <strong>Abstract:</strong> Security is one of the crucial challenges in the design and development of IoT applications. 
         This paper presents an approach that focuses on existing security standards to evaluate and 
         analyse the potential risks faced by IoT systems. It begins by identifying system assets and 
         their associated vulnerabilities and threats. A list of security objectives and technical 
         requirements are then defined to mitigate the risks and build a secure and safe system. 
         We use our approach to assess risks in the robotic system for supporting the movement of loads 
         in a warehouse.</p>
  vod: https://youtu.be/SOJCH-alwjU
  slides: https://www.slideshare.net/BrainIoT/samiot-risk-assessment-in-iot-case-study-collaborative-robots-system

-- Unfortunately, the result is not what I expected:

First I get 2 icons representing 2 links on the agenda following the title of the paper
None of these links work

To Reproduce https://deploy-preview-130--eclipsefdn-events.netlify.app/2020/sam-iot/

Thanks a lot for your help