| article html file updated | 7 February 2020 06:59 CET | Update | https://www.mdpi.com/2225-1154/4/2/20 |
| article html file updated | 5 May 2019 19:15 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:21 CET | Update | N/A |
| article html file updated | 1 July 2016 10:39 CEST | Update | N/A |
| article html file updated | 8 April 2016 09:39 CEST | Original file | N/A |
| article xml uploaded. | 8 April 2016 09:38 CEST | Original file | https://www.mdpi.com/2225-1154/4/2/20/xml |
| article pdf uploaded. | 8 April 2016 09:38 CEST | Version of Record | https://www.mdpi.com/2225-1154/4/2/20/pdf |
