| article html file updated | 6 February 2020 08:43 CET | Update | https://www.mdpi.com/2072-6643/6/4/1691 |
| article html file updated | 20 September 2019 07:35 CEST | Update | - |
| article html file updated | 7 May 2019 15:38 CEST | Update | - |
| article html file updated | 21 March 2019 15:49 CET | Update | - |
| article html file updated | 20 August 2015 03:54 CEST | Update | - |
| article html file updated | 12 May 2014 15:31 CEST | Original file | - |
| article xml file uploaded | 12 May 2014 15:31 CEST | Original file | https://www.mdpi.com/2072-6643/6/4/1691/xml |
| article pdf uploaded. | 22 April 2014 08:35 CEST | Version of Record | https://www.mdpi.com/2072-6643/6/4/1691/pdf |
