| article html file updated | 6 February 2020 02:02 CET | Update | https://www.mdpi.com/2079-4991/3/2/272 |
| article html file updated | 8 May 2019 05:17 CEST | Update | - |
| article html file updated | 20 March 2019 22:24 CET | Update | - |
| article html file updated | 23 February 2017 08:55 CET | Update | - |
| article html file updated | 17 June 2015 09:14 CEST | Update | - |
| article html file updated | 14 August 2014 12:04 CEST | Original file | - |
| article xml file uploaded | 14 August 2014 12:04 CEST | Original file | https://www.mdpi.com/2079-4991/3/2/272/xml |
| article pdf uploaded. | 5 June 2013 15:48 CEST | Updated version of record | https://www.mdpi.com/2079-4991/3/2/272/pdf |
| article pdf uploaded. | 14 May 2013 14:34 CEST | Updated version of record | https://www.mdpi.com/2079-4991/3/2/272/pdf-vor |
| article pdf uploaded. | 13 May 2013 14:08 CEST | Version of Record | https://www.mdpi.com/2079-4991/3/2/272/pdf-vor |
