| article html file updated | 7 February 2020 09:59 CET | Update | https://www.mdpi.com/1996-1073/9/6/444 |
| article html file updated | 5 May 2019 13:18 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:09 CET | Update | N/A |
| article html file updated | 28 June 2016 09:32 CEST | Update | N/A |
| article html file updated | 9 June 2016 09:59 CEST | Original file | N/A |
| article xml uploaded. | 9 June 2016 09:57 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/444/xml |
| article pdf uploaded. | 9 June 2016 09:57 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/444/pdf |
