| article html file updated | 9 February 2020 01:43 CET | Update | https://www.mdpi.com/1996-1073/11/1/89 |
| article html file updated | 29 September 2019 14:41 CEST | Update | - |
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| article html file updated | 1 February 2018 11:14 CET | Update | - |
| article html file updated | 3 January 2018 11:50 CET | Update | - |
| article xml uploaded. | 3 January 2018 11:49 CET | Update | https://www.mdpi.com/1996-1073/11/1/89/xml |
| article pdf uploaded. | 3 January 2018 11:49 CET | Updated version of record | https://www.mdpi.com/1996-1073/11/1/89/pdf |
| article html file updated | 3 January 2018 11:29 CET | Original file | - |
| article pdf uploaded. | 3 January 2018 11:27 CET | Updated version of record | - |
