| article html file updated | 6 February 2020 06:52 CET | Update | https://www.mdpi.com/2073-4468/3/1/56 |
| article html file updated | 7 May 2019 19:30 CEST | Update | - |
| article html file updated | 21 March 2019 11:23 CET | Update | - |
| article html file updated | 19 August 2015 18:24 CEST | Update | - |
| article html file updated | 27 November 2014 04:17 CET | Original file | - |
| article xml file uploaded | 27 November 2014 04:17 CET | Original file | https://www.mdpi.com/2073-4468/3/1/56/xml |
| article pdf uploaded. | 23 January 2014 16:01 CET | Updated version of record | https://www.mdpi.com/2073-4468/3/1/56/pdf |
| article pdf uploaded. | 22 January 2014 14:08 CET | Version of Record | https://www.mdpi.com/2073-4468/3/1/56/pdf-vor |
