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Heathcote, Edwin (9 August 2013). "Toytown and the city". Financial Times. The Financial Times Limited. Archived from the original on 15 August 2013. Retrieved 17 December 2013.
Reinhard Wolff (2018-02-12). "Wo ist der grüne Klotz?" [Where is the green block?]. Die Tageszeitung (taz) (in German). Retrieved 2021-02-04. Schadstoffbelastung in Legosteinen (Pollutant load in Lego bricks)
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Heathcote, Edwin (9 August 2013). "Toytown and the city". Financial Times. The Financial Times Limited. Archived from the original on 15 August 2013. Retrieved 17 December 2013.