| article html file updated | 9 February 2020 02:10 CET | Update | https://www.mdpi.com/2226-4787/6/1/4 |
| article html file updated | 29 September 2019 17:12 CEST | Update | - |
| article html file updated | 2 May 2019 04:04 CEST | Update | - |
| article html file updated | 18 April 2019 02:10 CEST | Update | - |
| article html file updated | 28 March 2019 13:30 CET | Update | - |
| article html file updated | 27 March 2018 15:00 CEST | Update | - |
| article html file updated | 8 January 2018 06:09 CET | Update | - |
| article xml uploaded. | 8 January 2018 06:08 CET | Update | https://www.mdpi.com/2226-4787/6/1/4/xml |
| article pdf uploaded. | 8 January 2018 06:08 CET | Updated version of record | https://www.mdpi.com/2226-4787/6/1/4/pdf |
| article html file updated | 6 January 2018 08:50 CET | Original file | - |
| article pdf uploaded. | 6 January 2018 08:49 CET | Version of Record | https://www.mdpi.com/2226-4787/6/1/4/pdf-vor |
