| article html file updated | 6 February 2020 08:12 CET | Update | https://www.mdpi.com/2075-163X/4/2/208 |
| article html file updated | 7 May 2019 16:44 CEST | Update | - |
| article html file updated | 21 March 2019 14:35 CET | Update | - |
| article html file updated | 20 August 2015 01:15 CEST | Update | - |
| article html file updated | 24 June 2014 12:21 CEST | Original file | - |
| article xml file uploaded | 24 June 2014 12:21 CEST | Original file | https://www.mdpi.com/2075-163X/4/2/208/xml |
| article pdf uploaded. | 28 March 2014 15:21 CET | Updated version of record | https://www.mdpi.com/2075-163X/4/2/208/pdf |
| article pdf uploaded. | 27 March 2014 08:43 CET | Version of Record | https://www.mdpi.com/2075-163X/4/2/208/pdf-vor |
