| article html file updated | 9 February 2020 11:22 CET | Update | https://www.mdpi.com/1996-1073/11/4/751 |
| article html file updated | 1 October 2019 23:59 CEST | Update | - |
| article html file updated | 1 May 2019 08:31 CEST | Update | - |
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| article html file updated | 1 May 2018 08:39 CEST | Update | - |
| article html file updated | 26 March 2018 17:35 CEST | Original file | - |
| article xml uploaded. | 26 March 2018 17:30 CEST | Original file | https://www.mdpi.com/1996-1073/11/4/751/xml |
| article pdf uploaded. | 26 March 2018 17:30 CEST | Version of Record | https://www.mdpi.com/1996-1073/11/4/751/pdf |
