Brain Games, season 2, episode 11, National Geographic Channel, braingames.nationalgeographic.com.
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Natalie Angier, Blind to Change, Even as It Stares Us in the Face, New York Times, 01.04.2008.
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Посмотреть фотожурнал Марка Хирша, а также купить его книгу об одиноком дубе можно на сайте http://thattree.net; Также см. ‘That Tree’: Photographer Mark Hirsch Becomes One with an Oak Tree in Lovely Documentary Project, Huffington Post, 29.05.2013, http://www.huffingtonpost.com/2013/05/29/that-tree-photographer-mark-hirsch-becomes-one-with-an-oak_n_3347786.html.
