| article html file updated | 9 February 2020 12:36 CET | Update | https://www.mdpi.com/2227-9067/5/4/47 |
| article html file updated | 2 October 2019 07:20 CEST | Update | - |
| article html file updated | 1 May 2019 05:56 CEST | Update | - |
| article html file updated | 17 April 2019 06:03 CEST | Update | - |
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| article html file updated | 1 May 2018 05:23 CEST | Update | - |
| article html file updated | 4 April 2018 17:46 CEST | Original file | - |
| article xml uploaded. | 4 April 2018 17:45 CEST | Original file | https://www.mdpi.com/2227-9067/5/4/47/xml |
| article pdf uploaded. | 4 April 2018 17:45 CEST | Version of Record | https://www.mdpi.com/2227-9067/5/4/47/pdf |
