| article html file updated | 6 February 2020 13:55 CET | Update | https://www.mdpi.com/2223-7747/3/4/559 |
| article html file updated | 7 May 2019 04:58 CEST | Update | N/A |
| article html file updated | 25 March 2019 18:17 CET | Update | N/A |
| article html file updated | 21 August 2015 02:41 CEST | Update | N/A |
| article html file updated | 30 December 2014 09:33 CET | Original file | N/A |
| article xml file uploaded | 30 December 2014 09:33 CET | Original file | https://www.mdpi.com/2223-7747/3/4/559/xml |
| article pdf uploaded. | 12 December 2014 08:22 CET | Updated version of record | https://www.mdpi.com/2223-7747/3/4/559/pdf |
| article pdf uploaded. | 25 November 2014 16:17 CET | Version of Record | https://www.mdpi.com/2223-7747/3/4/559/pdf-vor |
