| article html file updated | 7 February 2020 10:05 CET | Update | https://www.mdpi.com/1996-1073/9/6/454 |
| article html file updated | 5 May 2019 13:06 CEST | Update | - |
| article html file updated | 27 March 2019 07:20 CET | Update | - |
| article html file updated | 28 June 2016 09:34 CEST | Update | - |
| article html file updated | 14 June 2016 22:42 CEST | Original file | - |
| article xml uploaded. | 13 June 2016 13:20 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/454/xml |
| article pdf uploaded. | 13 June 2016 13:20 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/454/pdf |
