| article html file updated | 6 February 2020 10:27 CET | Update | https://www.mdpi.com/2075-1729/4/3/281 |
| article html file updated | 7 May 2019 12:08 CEST | Update | - |
| article html file updated | 21 March 2019 20:10 CET | Update | - |
| article html file updated | 20 August 2015 11:49 CEST | Update | - |
| article html file updated | 24 October 2014 07:43 CEST | Original file | - |
| article xml file uploaded | 24 October 2014 07:43 CEST | Original file | https://www.mdpi.com/2075-1729/4/3/281/xml |
| article pdf uploaded. | 4 July 2014 08:52 CEST | Updated version of record | https://www.mdpi.com/2075-1729/4/3/281/pdf |
| article pdf uploaded. | 3 July 2014 13:58 CEST | Version of Record | https://www.mdpi.com/2075-1729/4/3/281/pdf-vor |
