| article html file updated | 9 February 2020 02:48 CET | Update | https://www.mdpi.com/2077-1312/6/1/9 |
| article html file updated | 29 September 2019 20:35 CEST | Update | - |
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| article html file updated | 27 March 2018 15:31 CEST | Update | - |
| article html file updated | 12 January 2018 09:20 CET | Original file | - |
| article xml uploaded. | 12 January 2018 09:19 CET | Update | https://www.mdpi.com/2077-1312/6/1/9/xml |
| article xml uploaded. | 12 January 2018 09:19 CET | Update | - |
| article xml uploaded. | 12 January 2018 09:19 CET | Original file | - |
| article pdf uploaded. | 12 January 2018 09:19 CET | Version of Record | https://www.mdpi.com/2077-1312/6/1/9/pdf |
