| article html file updated | 12 February 2020 02:36 CET | Update | https://www.mdpi.com/2227-9067/6/4/51 |
| article html file updated | 17 October 2019 15:53 CEST | Update | - |
| article html file updated | 8 May 2019 20:02 CEST | Update | - |
| article html file updated | 25 April 2019 17:42 CEST | Update | - |
| article html file updated | 19 April 2019 11:54 CEST | Original file | - |
| article pdf uploaded. | 19 April 2019 11:52 CEST | Updated version of record | https://www.mdpi.com/2227-9067/6/4/51/pdf |
| article xml uploaded. | 19 April 2019 11:52 CEST | Update | https://www.mdpi.com/2227-9067/6/4/51/xml |
| article xml file uploaded | 19 April 2019 11:52 CEST | Update | - |
| article pdf uploaded. | 2 April 2019 17:31 CEST | Version of Record | https://www.mdpi.com/2227-9067/6/4/51/pdf-vor |
| article xml file uploaded | 2 April 2019 17:31 CEST | Original file | - |
