| article html file updated | 14 February 2020 14:42 CET | Update | https://www.mdpi.com/2224-2708/8/4/55 |
| article html file updated | 31 December 2019 19:19 CET | Update | - |
| article html file updated | 30 November 2019 12:04 CET | Original file | - |
| article pdf uploaded. | 30 November 2019 12:01 CET | Version of Record | https://www.mdpi.com/2224-2708/8/4/55/pdf |
| article xml uploaded. | 30 November 2019 12:01 CET | Update | https://www.mdpi.com/2224-2708/8/4/55/xml |
| article xml file uploaded | 30 November 2019 12:01 CET | Original file | - |
