| article html file updated | 9 February 2020 09:14 CET | Update | https://www.mdpi.com/2227-7080/6/1/30 |
| article html file updated | 1 October 2019 10:23 CEST | Update | - |
| article html file updated | 1 May 2019 13:01 CEST | Update | - |
| article html file updated | 17 April 2019 12:42 CEST | Update | - |
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| article html file updated | 28 March 2018 04:23 CEST | Update | - |
| article html file updated | 27 March 2018 16:54 CEST | Update | - |
| article html file updated | 9 March 2018 10:25 CET | Original file | - |
| article xml uploaded. | 9 March 2018 10:24 CET | Update | https://www.mdpi.com/2227-7080/6/1/30/xml |
| article pdf uploaded. | 9 March 2018 10:24 CET | Version of Record | https://www.mdpi.com/2227-7080/6/1/30/pdf |
