| article html file updated | 7 February 2020 10:27 CET | Update | https://www.mdpi.com/1996-1073/9/6/472 |
| article html file updated | 5 May 2019 12:23 CEST | Update | - |
| article html file updated | 27 March 2019 08:00 CET | Update | - |
| article html file updated | 28 June 2016 09:37 CEST | Update | - |
| article html file updated | 21 June 2016 08:55 CEST | Original file | - |
| article xml uploaded. | 21 June 2016 08:53 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/472/xml |
| article pdf uploaded. | 21 June 2016 08:53 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/472/pdf |
