| article html file updated | 7 February 2020 10:25 CET | Update | https://www.mdpi.com/1996-1073/9/6/470 |
| article html file updated | 5 May 2019 12:29 CEST | Update | - |
| article html file updated | 27 March 2019 07:55 CET | Update | - |
| article html file updated | 28 June 2016 09:36 CEST | Update | - |
| article html file updated | 18 June 2016 10:46 CEST | Original file | - |
| article xml uploaded. | 18 June 2016 10:45 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/470/xml |
| article pdf uploaded. | 18 June 2016 10:45 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/470/pdf |
