| article html file updated | 7 February 2020 22:41 CET | Update | https://www.mdpi.com/2227-7102/7/1/23 |
| article html file updated | 23 September 2019 03:59 CEST | Update | N/A |
| article html file updated | 4 May 2019 12:41 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:55 CEST | Update | N/A |
| article html file updated | 4 February 2017 11:19 CET | Original file | N/A |
| article xml uploaded. | 4 February 2017 11:18 CET | Original file | https://www.mdpi.com/2227-7102/7/1/23/xml |
| article pdf uploaded. | 4 February 2017 11:18 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/23/pdf |
