| article html file updated | 9 February 2020 18:33 CET | Update | https://www.mdpi.com/2227-7080/6/2/52 |
| article html file updated | 3 October 2019 20:12 CEST | Update | - |
| article html file updated | 30 April 2019 17:48 CEST | Update | - |
| article html file updated | 16 April 2019 18:13 CEST | Update | - |
| article html file updated | 30 March 2019 03:18 CET | Update | - |
| article html file updated | 26 June 2018 05:09 CEST | Update | - |
| article html file updated | 22 May 2018 10:24 CEST | Original file | - |
| article pdf uploaded. | 22 May 2018 10:23 CEST | Version of Record | https://www.mdpi.com/2227-7080/6/2/52/pdf |
| article xml uploaded. | 22 May 2018 10:23 CEST | Update | https://www.mdpi.com/2227-7080/6/2/52/xml |
| article xml file uploaded | 22 May 2018 10:23 CEST | Original file | - |
