| article html file updated | 7 February 2020 14:09 CET | Update | https://www.mdpi.com/1996-1073/9/9/693 |
| article html file updated | 5 May 2019 05:38 CEST | Update | N/A |
| article html file updated | 27 March 2019 15:22 CET | Update | N/A |
| article html file updated | 26 September 2016 11:51 CEST | Update | N/A |
| article html file updated | 31 August 2016 08:59 CEST | Original file | N/A |
| article xml uploaded. | 31 August 2016 08:57 CEST | Update | https://www.mdpi.com/1996-1073/9/9/693/xml |
| article xml uploaded. | 31 August 2016 08:57 CEST | Original file | N/A |
| article pdf uploaded. | 31 August 2016 08:57 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/9/693/pdf |