| article html file updated | 9 February 2020 08:48 CET | Update | https://www.mdpi.com/2218-2004/6/1/9 |
| article html file updated | 1 May 2019 13:55 CEST | Update | - |
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| article html file updated | 26 March 2018 15:30 CEST | Update | - |
| article html file updated | 6 March 2018 16:23 CET | Original file | - |
| article xml uploaded. | 6 March 2018 16:22 CET | Original file | https://www.mdpi.com/2218-2004/6/1/9/xml |
| article pdf uploaded. | 6 March 2018 16:22 CET | Version of Record | https://www.mdpi.com/2218-2004/6/1/9/pdf |
