| article html file updated | 8 February 2020 22:57 CET | Update | https://www.mdpi.com/2411-5142/2/4/44 |
| article html file updated | 28 September 2019 22:43 CEST | Update | - |
| article html file updated | 2 May 2019 11:03 CEST | Update | - |
| article html file updated | 18 April 2019 08:41 CEST | Update | - |
| article html file updated | 4 December 2017 07:28 CET | Original file | - |
| article xml uploaded. | 4 December 2017 07:27 CET | Original file | https://www.mdpi.com/2411-5142/2/4/44/xml |
| article pdf uploaded. | 4 December 2017 07:27 CET | Updated version of record | https://www.mdpi.com/2411-5142/2/4/44/pdf |
| article pdf uploaded. | 2 December 2017 12:29 CET | Version of Record | https://www.mdpi.com/2411-5142/2/4/44/pdf-vor |
