| article html file updated | 9 February 2020 10:35 CET | Update | https://www.mdpi.com/2308-3417/3/2/13 |
| article html file updated | 1 October 2019 19:31 CEST | Update | N/A |
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| article html file updated | 21 March 2018 04:02 CET | Original file | N/A |
| article pdf uploaded. | 21 March 2018 04:01 CET | Version of Record | https://www.mdpi.com/2308-3417/3/2/13/pdf |
