| article html file updated | 9 February 2020 06:17 CET | Update | https://www.mdpi.com/2227-7080/6/1/23 |
| article html file updated | 30 September 2019 17:21 CEST | Update | N/A |
| article html file updated | 1 May 2019 19:11 CEST | Update | N/A |
| article html file updated | 17 April 2019 18:24 CEST | Update | N/A |
| article html file updated | 28 March 2019 22:37 CET | Update | N/A |
| article html file updated | 28 March 2018 04:22 CEST | Update | N/A |
| article html file updated | 27 March 2018 16:53 CEST | Update | N/A |
| article html file updated | 11 February 2018 10:41 CET | Original file | N/A |
| article xml uploaded. | 11 February 2018 10:39 CET | Update | https://www.mdpi.com/2227-7080/6/1/23/xml |
| article xml uploaded. | 11 February 2018 10:39 CET | Original file | N/A |
| article pdf uploaded. | 11 February 2018 10:39 CET | Version of Record | https://www.mdpi.com/2227-7080/6/1/23/pdf |
