| article html file updated | 7 February 2020 07:31 CET | Update | https://www.mdpi.com/2072-6643/8/4/217 |
| article html file updated | 21 September 2019 15:33 CEST | Update | - |
| article html file updated | 5 May 2019 18:07 CEST | Update | - |
| article html file updated | 27 March 2019 02:24 CET | Update | - |
| article html file updated | 28 April 2016 09:26 CEST | Update | - |
| article html file updated | 20 April 2016 10:33 CEST | Original file | - |
| article xml uploaded. | 20 April 2016 10:31 CEST | Original file | https://www.mdpi.com/2072-6643/8/4/217/xml |
| article pdf uploaded. | 20 April 2016 10:31 CEST | Version of Record | https://www.mdpi.com/2072-6643/8/4/217/pdf |
