| article html file updated | 9 February 2020 06:25 CET | Update | https://www.mdpi.com/2218-2004/6/1/7 |
| article html file updated | 1 May 2019 18:54 CEST | Update | - |
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| article html file updated | 26 March 2018 15:30 CEST | Update | - |
| article html file updated | 12 February 2018 11:22 CET | Original file | - |
| article xml uploaded. | 12 February 2018 11:21 CET | Original file | https://www.mdpi.com/2218-2004/6/1/7/xml |
| article pdf uploaded. | 12 February 2018 11:21 CET | Version of Record | https://www.mdpi.com/2218-2004/6/1/7/pdf |
