| article html file updated | 7 February 2020 21:09 CET | Update | https://www.mdpi.com/2227-7102/7/1/12 |
| article html file updated | 22 September 2019 19:48 CEST | Update | N/A |
| article html file updated | 4 May 2019 16:01 CEST | Update | N/A |
| article html file updated | 27 October 2017 09:54 CEST | Update | N/A |
| article html file updated | 10 January 2017 14:30 CET | Original file | N/A |
| article xml uploaded. | 10 January 2017 14:29 CET | Original file | https://www.mdpi.com/2227-7102/7/1/12/xml |
| article pdf uploaded. | 10 January 2017 14:29 CET | Version of Record | https://www.mdpi.com/2227-7102/7/1/12/pdf |
