| article html file updated | 7 February 2020 10:16 CET | Update | https://www.mdpi.com/1996-1073/9/6/462 |
| article html file updated | 5 May 2019 12:45 CEST | Update | - |
| article html file updated | 27 March 2019 07:41 CET | Update | - |
| article html file updated | 28 June 2016 09:35 CEST | Update | - |
| article html file updated | 16 June 2016 12:29 CEST | Original file | - |
| article xml uploaded. | 16 June 2016 12:27 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/462/xml |
| article pdf uploaded. | 16 June 2016 12:27 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/462/pdf |
