| article html file updated | 12 February 2020 03:12 CET | Update | https://www.mdpi.com/2227-9067/6/4/55 |
| article html file updated | 17 October 2019 19:19 CEST | Update | N/A |
| article html file updated | 8 May 2019 20:08 CEST | Update | N/A |
| article html file updated | 25 April 2019 16:30 CEST | Update | N/A |
| article html file updated | 18 April 2019 05:45 CEST | Original file | N/A |
| article pdf uploaded. | 18 April 2019 05:44 CEST | Updated version of record | https://www.mdpi.com/2227-9067/6/4/55/pdf |
| article xml uploaded. | 18 April 2019 05:44 CEST | Update | https://www.mdpi.com/2227-9067/6/4/55/xml |
| article xml file uploaded | 18 April 2019 05:44 CEST | Update | N/A |
| article pdf uploaded. | 4 April 2019 16:09 CEST | Version of Record | https://www.mdpi.com/2227-9067/6/4/55/pdf-vor |
| article xml file uploaded | 4 April 2019 16:09 CEST | Original file | N/A |
