| article html file updated | 6 February 2020 08:20 CET | Update | https://www.mdpi.com/2075-1729/4/2/117 |
| article html file updated | 7 May 2019 16:26 CEST | Update | N/A |
| article html file updated | 21 March 2019 14:54 CET | Update | N/A |
| article html file updated | 20 August 2015 02:02 CEST | Update | N/A |
| article html file updated | 26 August 2014 04:22 CEST | Original file | N/A |
| article xml file uploaded | 26 August 2014 04:22 CEST | Original file | https://www.mdpi.com/2075-1729/4/2/117/xml |
| article pdf uploaded. | 2 April 2014 15:42 CEST | Version of Record | https://www.mdpi.com/2075-1729/4/2/117/pdf |
