| article html file updated | 7 February 2020 07:12 CET | Update | https://www.mdpi.com/1996-1073/9/4/286 |
| article html file updated | 5 May 2019 18:46 CEST | Update | N/A |
| article html file updated | 27 March 2019 01:46 CET | Update | N/A |
| article html file updated | 28 April 2016 07:57 CEST | Update | N/A |
| article html file updated | 13 April 2016 10:51 CEST | Original file | N/A |
| article xml uploaded. | 13 April 2016 10:50 CEST | Original file | https://www.mdpi.com/1996-1073/9/4/286/xml |
| article pdf uploaded. | 13 April 2016 10:50 CEST | Version of Record | https://www.mdpi.com/1996-1073/9/4/286/pdf |
