| article html file updated | 8 February 2020 19:03 CET | Update | https://www.mdpi.com/2227-7072/5/4/23 |
| article html file updated | 27 September 2019 21:58 CEST | Update | - |
| article html file updated | 2 May 2019 19:54 CEST | Update | - |
| article html file updated | 2 January 2018 13:29 CET | Update | - |
| article html file updated | 25 October 2017 08:13 CEST | Original file | - |
| article xml uploaded. | 25 October 2017 08:12 CEST | Original file | https://www.mdpi.com/2227-7072/5/4/23/xml |
| article pdf uploaded. | 25 October 2017 08:12 CEST | Updated version of record | https://www.mdpi.com/2227-7072/5/4/23/pdf |
| article pdf uploaded. | 20 October 2017 15:05 CEST | Version of Record | https://www.mdpi.com/2227-7072/5/4/23/pdf-vor |
