| article html file updated | 9 February 2020 08:43 CET | Update | https://www.mdpi.com/2079-9268/8/1/7 |
| article html file updated | 1 October 2019 07:23 CEST | Update | - |
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| article html file updated | 29 March 2019 04:09 CET | Update | - |
| article html file updated | 6 March 2018 04:50 CET | Original file | - |
| article xml uploaded. | 6 March 2018 04:49 CET | Original file | https://www.mdpi.com/2079-9268/8/1/7/xml |
| article pdf uploaded. | 6 March 2018 04:49 CET | Version of Record | https://www.mdpi.com/2079-9268/8/1/7/pdf |
