"Fritz Vahrenholt". Koepfe der Wirtschaft. Wirtschafts Woche. Archived from the original on 2014-10-07. Retrieved 4 February 2015.
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Vahrenholt, Fritz; Lüning, Sebastian (2015). The Neglected Sun: Why the Sun Precludes Climate Catastrophe (2nd English ed.). Arlington Heights, Illinois: Heartland Institute. ISBN9781934791547. OCLC976435873.