| article html file updated | 9 February 2020 00:58 CET | Update | https://www.mdpi.com/2073-4425/9/1/4 |
| article html file updated | 29 September 2019 10:24 CEST | Update | - |
| article html file updated | 2 May 2019 06:39 CEST | Update | - |
| article html file updated | 18 April 2019 04:34 CEST | Update | - |
| article html file updated | 28 March 2019 10:35 CET | Update | - |
| article html file updated | 1 February 2018 08:00 CET | Update | - |
| article html file updated | 24 December 2017 14:29 CET | Original file | - |
| article xml uploaded. | 24 December 2017 14:28 CET | Original file | https://www.mdpi.com/2073-4425/9/1/4/xml |
| article pdf uploaded. | 24 December 2017 14:28 CET | Updated version of record | https://www.mdpi.com/2073-4425/9/1/4/pdf |
| article pdf uploaded. | 22 December 2017 16:23 CET | Version of Record | https://www.mdpi.com/2073-4425/9/1/4/pdf-vor |
