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<bdi><a href="https://en.wikipedia.org/wiki/en:Antoni_Lange" class="extiw" title="w:en:Antoni Lange"><span title="Polish writer and philosopher">Antoni Lange</span></a>
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<a rel="nofollow" class="external text" href="http://kpbc.umk.pl/dlibra/doccontent?id=17549">Kujawsko-Pomorska Biblioteka Cyfrowa</a> and <a rel="nofollow" class="external text" href="http://polona.pl/item/1941173/">CBN Polona</a> (pp. 6-7)