| article html file updated | 7 February 2020 10:37 CET | Update | https://www.mdpi.com/1996-1073/9/7/478 |
| article html file updated | 5 May 2019 12:06 CEST | Update | - |
| article html file updated | 27 March 2019 08:17 CET | Update | - |
| article html file updated | 27 July 2016 09:23 CEST | Update | - |
| article html file updated | 23 June 2016 11:28 CEST | Original file | - |
| article xml uploaded. | 23 June 2016 11:26 CEST | Original file | https://www.mdpi.com/1996-1073/9/7/478/xml |
| article pdf uploaded. | 23 June 2016 11:26 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/7/478/pdf |
