| article html file updated | 9 February 2020 04:58 CET | Update | https://www.mdpi.com/2073-4352/8/2/69 |
| article html file updated | 30 September 2019 09:11 CEST | Update | - |
| article html file updated | 1 May 2019 22:12 CEST | Update | - |
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| article html file updated | 14 March 2018 09:03 CET | Update | - |
| article html file updated | 31 January 2018 09:15 CET | Original file | - |
| article xml uploaded. | 31 January 2018 09:14 CET | Original file | https://www.mdpi.com/2073-4352/8/2/69/xml |
| article pdf uploaded. | 31 January 2018 09:14 CET | Version of Record | https://www.mdpi.com/2073-4352/8/2/69/pdf |
