| article html file updated | 9 February 2020 02:11 CET | Update | https://www.mdpi.com/2226-4310/5/1/4 |
| article html file updated | 29 September 2019 17:14 CEST | Update | - |
| article html file updated | 2 May 2019 04:03 CEST | Update | - |
| article html file updated | 18 April 2019 02:10 CEST | Update | - |
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| article html file updated | 26 March 2018 15:49 CEST | Update | - |
| article html file updated | 6 January 2018 09:02 CET | Original file | - |
| article xml uploaded. | 6 January 2018 09:01 CET | Update | https://www.mdpi.com/2226-4310/5/1/4/xml |
| article pdf uploaded. | 6 January 2018 09:01 CET | Version of Record | https://www.mdpi.com/2226-4310/5/1/4/pdf |
