| article html file updated | 11 February 2020 18:11 CET | Update | https://www.mdpi.com/2226-4787/7/1/21 |
| article html file updated | 15 October 2019 13:15 CEST | Update | - |
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| article html file updated | 23 February 2019 10:39 CET | Original file | - |
| article pdf uploaded. | 23 February 2019 10:36 CET | Version of Record | https://www.mdpi.com/2226-4787/7/1/21/pdf |
| article xml uploaded. | 23 February 2019 10:36 CET | Update | https://www.mdpi.com/2226-4787/7/1/21/xml |
| article xml file uploaded | 23 February 2019 10:36 CET | Original file | - |
