| article html file updated | 13 February 2020 21:49 CET | Update | https://www.mdpi.com/2227-7072/7/4/56 |
| article html file updated | 31 December 2019 06:05 CET | Update | - |
| article html file updated | 13 October 2019 12:23 CEST | Original file | - |
| article pdf uploaded. | 13 October 2019 12:21 CEST | Updated version of record | https://www.mdpi.com/2227-7072/7/4/56/pdf |
| article xml uploaded. | 13 October 2019 12:21 CEST | Update | https://www.mdpi.com/2227-7072/7/4/56/xml |
| article xml file uploaded | 13 October 2019 12:21 CEST | Update | - |
| article pdf uploaded. | 1 October 2019 12:59 CEST | Version of Record | https://www.mdpi.com/2227-7072/7/4/56/pdf-vor |
| article xml file uploaded | 1 October 2019 12:59 CEST | Original file | - |
