| article html file updated | 17 September 2021 08:40 CEST | Update | https://new.mdpi.com/2227-7080/6/1/21 |
| article xml uploaded. | 17 September 2021 08:38 CEST | Update | https://new.mdpi.com/2227-7080/6/1/21/xml |
| article html file updated | 9 February 2020 06:03 CET | Update | - |
| article html file updated | 30 September 2019 15:57 CEST | Update | - |
| article html file updated | 1 May 2019 19:44 CEST | Update | - |
| article html file updated | 17 April 2019 18:51 CEST | Update | - |
| article html file updated | 28 March 2019 22:07 CET | Update | - |
| article html file updated | 28 March 2018 04:22 CEST | Update | - |
| article html file updated | 27 March 2018 16:52 CEST | Update | - |
| article html file updated | 9 February 2018 11:50 CET | Original file | - |
| article xml uploaded. | 9 February 2018 11:30 CET | Update | - |
| article xml uploaded. | 9 February 2018 11:30 CET | Original file | - |
| article pdf uploaded. | 9 February 2018 11:30 CET | Version of Record | https://new.mdpi.com/2227-7080/6/1/21/pdf |
