| article html file updated | 7 February 2020 10:08 CET | Update | https://www.mdpi.com/1996-1073/9/6/455 |
| article html file updated | 5 May 2019 13:01 CEST | Update | N/A |
| article html file updated | 27 March 2019 07:25 CET | Update | N/A |
| article html file updated | 28 June 2016 09:34 CEST | Update | N/A |
| article html file updated | 14 June 2016 15:30 CEST | Original file | N/A |
| article xml uploaded. | 14 June 2016 15:29 CEST | Original file | https://www.mdpi.com/1996-1073/9/6/455/xml |
| article pdf uploaded. | 14 June 2016 15:29 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/6/455/pdf |
