| article html file updated | 7 February 2020 06:36 CET | Update | https://www.mdpi.com/2218-6581/5/2/9 |
| article html file updated | 5 May 2019 20:01 CEST | Update | N/A |
| article html file updated | 27 March 2019 00:39 CET | Update | N/A |
| article html file updated | 4 July 2016 10:38 CEST | Update | N/A |
| article html file updated | 30 March 2016 08:59 CEST | Original file | N/A |
| article xml uploaded. | 30 March 2016 08:57 CEST | Update | https://www.mdpi.com/2218-6581/5/2/9/xml |
| article pdf uploaded. | 30 March 2016 08:57 CEST | Version of Record | https://www.mdpi.com/2218-6581/5/2/9/pdf |
