| article html file updated | 9 February 2020 13:13 CET | Update | https://www.mdpi.com/2227-9067/5/4/49 |
| article html file updated | 2 October 2019 11:09 CEST | Update | - |
| article html file updated | 1 May 2019 04:41 CEST | Update | - |
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| article html file updated | 1 May 2018 05:24 CEST | Update | - |
| article html file updated | 10 April 2018 15:46 CEST | Original file | - |
| article xml uploaded. | 10 April 2018 15:45 CEST | Update | https://www.mdpi.com/2227-9067/5/4/49/xml |
| article pdf uploaded. | 10 April 2018 15:45 CEST | Version of Record | https://www.mdpi.com/2227-9067/5/4/49/pdf |
