| article html file updated | 9 February 2020 01:55 CET | Update | https://www.mdpi.com/1996-1073/11/1/117 |
| article html file updated | 29 September 2019 15:52 CEST | Update | - |
| article html file updated | 2 May 2019 04:36 CEST | Update | - |
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| article html file updated | 28 March 2019 12:55 CET | Update | - |
| article html file updated | 1 February 2018 12:44 CET | Update | - |
| article html file updated | 3 January 2018 15:11 CET | Original file | - |
| article xml uploaded. | 3 January 2018 15:10 CET | Update | https://www.mdpi.com/1996-1073/11/1/117/xml |
| article pdf uploaded. | 3 January 2018 15:10 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/117/pdf |
