| article html file updated | 6 February 2020 04:05 CET | Update | https://www.mdpi.com/2079-6439/1/2/21 |
| article html file updated | 8 May 2019 01:03 CEST | Update | - |
| article html file updated | 21 March 2019 03:52 CET | Update | - |
| article html file updated | 17 June 2015 12:47 CEST | Update | - |
| article html file updated | 14 August 2014 11:41 CEST | Update | - |
| article xml file uploaded | 14 August 2014 11:41 CEST | Update | https://www.mdpi.com/2079-6439/1/2/21/xml |
| article html file updated | 14 August 2014 11:21 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 11:21 CEST | Original file | - |
| article pdf uploaded. | 2 September 2013 09:31 CEST | Updated version of record | https://www.mdpi.com/2079-6439/1/2/21/pdf |
| article pdf uploaded. | 30 August 2013 09:23 CEST | Version of Record | https://www.mdpi.com/2079-6439/1/2/21/pdf-vor |
