| article html file updated | 8 February 2020 19:28 CET | Update | https://www.mdpi.com/2227-7080/5/4/69 |
| article html file updated | 28 September 2019 00:27 CEST | Update | N/A |
| article html file updated | 2 May 2019 18:56 CEST | Update | N/A |
| article html file updated | 2 January 2018 11:13 CET | Update | N/A |
| article html file updated | 25 October 2017 14:31 CEST | Original file | N/A |
| article xml uploaded. | 25 October 2017 14:30 CEST | Original file | https://www.mdpi.com/2227-7080/5/4/69/xml |
| article pdf uploaded. | 25 October 2017 14:30 CEST | Version of Record | https://www.mdpi.com/2227-7080/5/4/69/pdf |
