| article html file updated | 9 February 2020 00:20 CET | Update | https://www.mdpi.com/2073-4360/9/12/724 |
| article html file updated | 29 September 2019 06:44 CEST | Update | - |
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| article html file updated | 2 January 2018 15:15 CET | Update | - |
| article html file updated | 16 December 2017 12:19 CET | Original file | - |
| article xml uploaded. | 16 December 2017 12:18 CET | Original file | https://www.mdpi.com/2073-4360/9/12/724/xml |
| article pdf uploaded. | 16 December 2017 12:18 CET | Version of Record | https://www.mdpi.com/2073-4360/9/12/724/pdf |
