| article html file updated | 9 February 2020 13:55 CET | Update | https://www.mdpi.com/2226-4787/6/2/31 |
| article html file updated | 2 October 2019 15:35 CEST | Update | - |
| article html file updated | 1 May 2019 03:17 CEST | Update | - |
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| article html file updated | 27 June 2018 09:24 CEST | Update | - |
| article html file updated | 16 April 2018 08:27 CEST | Original file | - |
| article pdf uploaded. | 16 April 2018 08:26 CEST | Version of Record | https://www.mdpi.com/2226-4787/6/2/31/pdf |
| article xml uploaded. | 16 April 2018 08:26 CEST | Update | https://www.mdpi.com/2226-4787/6/2/31/xml |
| article xml file uploaded | 16 April 2018 08:26 CEST | Original file | - |
