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. 2016 Nov 11;110(1):335–353. doi: 10.1007/s11192-016-2177-x

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 3 — Annual distribution of cited references, which are co-cited with Arrhenius (1896) throughout the time period 1686–1970. The curves in the top left corner focus on the time period 1800–1850 as one part of the overall figure. As a consequence of line smoothing the red curves cross the zero line. (Color figure online)