| article html file updated | 6 February 2020 09:03 CET | Update | https://www.mdpi.com/2218-273X/4/2/498 |
| article html file updated | 7 May 2019 14:56 CEST | Update | - |
| article html file updated | 21 March 2019 16:36 CET | Update | - |
| article html file updated | 14 March 2018 13:27 CET | Update | - |
| article html file updated | 20 August 2015 05:51 CEST | Update | - |
| article html file updated | 18 July 2014 03:56 CEST | Original file | - |
| article xml file uploaded | 18 July 2014 03:56 CEST | Original file | https://www.mdpi.com/2218-273X/4/2/498/xml |
| article pdf uploaded. | 8 May 2014 14:41 CEST | Updated version of record | https://www.mdpi.com/2218-273X/4/2/498/pdf |
| article pdf uploaded. | 6 May 2014 10:56 CEST | Version of Record | https://www.mdpi.com/2218-273X/4/2/498/pdf-vor |
