| article html file updated | 7 February 2020 07:42 CET | Update | https://www.mdpi.com/2072-6643/8/4/240 |
| article html file updated | 21 September 2019 15:50 CEST | Update | - |
| article html file updated | 5 May 2019 17:45 CEST | Update | - |
| article html file updated | 27 March 2019 02:48 CET | Update | - |
| article html file updated | 28 April 2016 09:32 CEST | Original file | - |
| article xml uploaded. | 23 April 2016 07:37 CEST | Original file | https://www.mdpi.com/2072-6643/8/4/240/xml |
| article pdf uploaded. | 23 April 2016 07:37 CEST | Version of Record | https://www.mdpi.com/2072-6643/8/4/240/pdf |
