| article html file updated | 6 February 2020 10:32 CET | Update | https://www.mdpi.com/2077-0375/4/3/319 |
| article html file updated | 7 May 2019 11:59 CEST | Update | - |
| article html file updated | 21 March 2019 20:22 CET | Update | - |
| article html file updated | 20 August 2015 12:06 CEST | Update | - |
| article html file updated | 14 October 2014 06:28 CEST | Update | - |
| article xml file uploaded | 14 October 2014 06:28 CEST | Update | https://www.mdpi.com/2077-0375/4/3/319/xml |
| article html file updated | 21 July 2014 09:34 CEST | Original file | - |
| article xml file uploaded | 21 July 2014 09:34 CEST | Original file | - |
| article pdf uploaded. | 14 July 2014 09:19 CEST | Updated version of record | https://www.mdpi.com/2077-0375/4/3/319/pdf |
| article pdf uploaded. | 8 July 2014 09:23 CEST | Version of Record | https://www.mdpi.com/2077-0375/4/3/319/pdf-vor |
