| article html file updated | 6 February 2020 07:30 CET | Update | https://www.mdpi.com/2079-7737/3/1/157 |
| article html file updated | 7 May 2019 18:10 CEST | Update | - |
| article html file updated | 21 March 2019 12:54 CET | Update | - |
| article html file updated | 19 August 2015 21:33 CEST | Update | - |
| article html file updated | 28 April 2014 10:30 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 10:30 CEST | Original file | https://www.mdpi.com/2079-7737/3/1/157/xml |
| article pdf uploaded. | 5 March 2014 16:19 CET | Updated version of record | https://www.mdpi.com/2079-7737/3/1/157/pdf |
| article pdf uploaded. | 25 February 2014 10:53 CET | Version of Record | https://www.mdpi.com/2079-7737/3/1/157/pdf-vor |
