| article html file updated | 9 February 2020 06:30 CET | Update | https://www.mdpi.com/2226-4787/6/1/18 |
| article html file updated | 1 May 2019 18:44 CEST | Update | - |
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| article html file updated | 27 March 2018 15:02 CEST | Update | - |
| article html file updated | 13 February 2018 08:39 CET | Original file | - |
| article xml uploaded. | 13 February 2018 08:38 CET | Original file | https://www.mdpi.com/2226-4787/6/1/18/xml |
| article pdf uploaded. | 13 February 2018 08:38 CET | Version of Record | https://www.mdpi.com/2226-4787/6/1/18/pdf |
