<a href="https://en.wikipedia.org/wiki/Lectron" class="extiw" title="en:Lectron">Braun Lectron</a> Elements; Exhibition <i>Systems design : The Ulm school</i> at Museu del Disseny (DHUB) in Barcelona; 21.September 2011 – 20.May 2012 <a rel="nofollow" class="external autonumber" href="http://museudeldisseny.cat/en/exhibition/systems-design-ulm-school">[1]</a>
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