| article html file updated | 8 February 2020 06:23 CET | Update | https://www.mdpi.com/2218-2004/5/2/20 |
| article html file updated | 24 September 2019 22:43 CEST | Update | N/A |
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| article html file updated | 28 June 2017 12:31 CEST | Update | N/A |
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| article html file updated | 21 May 2017 07:46 CEST | Original file | N/A |
| article xml uploaded. | 21 May 2017 07:44 CEST | Original file | https://www.mdpi.com/2218-2004/5/2/20/xml |
| article pdf uploaded. | 21 May 2017 07:44 CEST | Version of Record | https://www.mdpi.com/2218-2004/5/2/20/pdf |
