| article html file updated | 9 February 2020 03:23 CET | Update | https://www.mdpi.com/1996-1073/11/1/221 |
| article html file updated | 29 September 2019 23:58 CEST | Update | - |
| article html file updated | 2 May 2019 01:36 CEST | Update | - |
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| article html file updated | 28 March 2019 16:18 CET | Update | - |
| article html file updated | 1 February 2018 14:18 CET | Update | - |
| article html file updated | 17 January 2018 16:12 CET | Original file | - |
| article xml uploaded. | 17 January 2018 16:11 CET | Update | https://www.mdpi.com/1996-1073/11/1/221/xml |
| article xml uploaded. | 17 January 2018 16:11 CET | Update | - |
| article xml uploaded. | 17 January 2018 16:11 CET | Original file | - |
| article pdf uploaded. | 17 January 2018 16:11 CET | Version of Record | https://www.mdpi.com/1996-1073/11/1/221/pdf |
