| article html file updated | 9 February 2020 14:54 CET | Update | https://www.mdpi.com/2227-7072/6/2/45 |
| article html file updated | 2 October 2019 21:11 CEST | Update | - |
| article html file updated | 1 May 2019 01:22 CEST | Update | - |
| article html file updated | 17 April 2019 01:58 CEST | Update | - |
| article html file updated | 29 March 2019 18:12 CET | Update | - |
| article html file updated | 27 June 2018 20:19 CEST | Update | - |
| article html file updated | 23 April 2018 10:51 CEST | Original file | - |
| article pdf uploaded. | 23 April 2018 10:49 CEST | Version of Record | https://www.mdpi.com/2227-7072/6/2/45/pdf |
| article xml uploaded. | 23 April 2018 10:49 CEST | Update | https://www.mdpi.com/2227-7072/6/2/45/xml |
| article xml file uploaded | 23 April 2018 10:49 CEST | Original file | - |
