<bdi><a href="https://en.wikipedia.org/wiki/en:Christian_Landenberger" class="extiw" title="w:en:Christian Landenberger"><span title="German artist (1862-1927)">Christian Landenberger</span></a>
</bdi>
<i>Leben am See, Heimatjahrbuch des Bodenseekreises</i>, 1991, S. 325