| article html file updated | 7 February 2020 21:13 CET | Update | https://www.mdpi.com/2227-7102/7/1/13 |
| article html file updated | 22 September 2019 20:05 CEST | Update | N/A |
| article html file updated | 4 May 2019 15:51 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:54 CEST | Update | N/A |
| article html file updated | 11 January 2017 15:03 CET | Original file | N/A |
| article xml uploaded. | 11 January 2017 15:02 CET | Original file | https://www.mdpi.com/2227-7102/7/1/13/xml |
| article pdf uploaded. | 11 January 2017 15:02 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/13/pdf |
