| article html file updated | 9 February 2020 00:46 CET | Update | https://www.mdpi.com/1422-0067/19/1/6 |
| article html file updated | 29 September 2019 09:15 CEST | Update | - |
| article html file updated | 2 May 2019 07:04 CEST | Update | - |
| article html file updated | 18 April 2019 04:58 CEST | Update | - |
| article html file updated | 2 February 2018 09:22 CET | Update | - |
| article html file updated | 21 December 2017 13:03 CET | Original file | - |
| article xml uploaded. | 21 December 2017 13:02 CET | Update | https://www.mdpi.com/1422-0067/19/1/6/xml |
| article xml uploaded. | 21 December 2017 13:02 CET | Original file | - |
| article pdf uploaded. | 21 December 2017 13:02 CET | Version of Record | https://www.mdpi.com/1422-0067/19/1/6/pdf |
