| article html file updated | 6 February 2020 10:00 CET | Update | https://www.mdpi.com/2076-0825/3/2/142 |
| article html file updated | 21 March 2019 18:58 CET | Update | - |
| article html file updated | 20 August 2015 10:03 CEST | Update | - |
| article html file updated | 11 September 2014 12:14 CEST | Original file | - |
| article xml file uploaded | 11 September 2014 12:14 CEST | Original file | https://www.mdpi.com/2076-0825/3/2/142/xml |
| article pdf uploaded. | 18 June 2014 09:56 CEST | Updated version of record | https://www.mdpi.com/2076-0825/3/2/142/pdf |
| article pdf uploaded. | 17 June 2014 08:48 CEST | Version of Record | https://www.mdpi.com/2076-0825/3/2/142/pdf-vor |
