| article html file updated | 8 February 2020 21:36 CET | Update | https://www.mdpi.com/2227-7080/5/4/73 |
| article html file updated | 28 September 2019 14:09 CEST | Update | - |
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| article html file updated | 18 April 2019 11:44 CEST | Update | - |
| article html file updated | 2 January 2018 11:13 CET | Update | - |
| article html file updated | 18 November 2017 12:19 CET | Original file | - |
| article xml uploaded. | 18 November 2017 12:18 CET | Original file | https://www.mdpi.com/2227-7080/5/4/73/xml |
| article pdf uploaded. | 18 November 2017 12:18 CET | Version of Record | https://www.mdpi.com/2227-7080/5/4/73/pdf |
