| article html file updated | 9 February 2020 00:55 CET | Update | https://www.mdpi.com/2076-3271/6/1/2 |
| article html file updated | 29 September 2019 10:07 CEST | Update | - |
| article html file updated | 2 May 2019 06:45 CEST | Update | - |
| article html file updated | 18 April 2019 04:40 CEST | Update | - |
| article html file updated | 28 March 2019 10:28 CET | Update | - |
| article html file updated | 28 March 2018 10:20 CEST | Update | - |
| article html file updated | 22 December 2017 12:50 CET | Original file | - |
| article xml uploaded. | 22 December 2017 12:49 CET | Update | https://www.mdpi.com/2076-3271/6/1/2/xml |
| article xml uploaded. | 22 December 2017 12:49 CET | Original file | - |
| article pdf uploaded. | 22 December 2017 12:49 CET | Version of Record | https://www.mdpi.com/2076-3271/6/1/2/pdf |
