| article html file updated | 9 February 2020 02:39 CET | Update | https://www.mdpi.com/2077-1312/6/1/8 |
| article html file updated | 2 May 2019 03:04 CEST | Update | - |
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| article html file updated | 27 March 2018 15:30 CEST | Update | - |
| article html file updated | 11 January 2018 09:54 CET | Original file | - |
| article xml uploaded. | 11 January 2018 09:52 CET | Original file | https://www.mdpi.com/2077-1312/6/1/8/xml |
| article pdf uploaded. | 11 January 2018 09:52 CET | Version of Record | https://www.mdpi.com/2077-1312/6/1/8/pdf |
