| article html file updated | 6 February 2020 09:01 CET | Update | https://www.mdpi.com/2075-1729/4/2/189 |
| article html file updated | 7 May 2019 15:00 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:32 CET | Update | N/A |
| article html file updated | 20 August 2015 05:43 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/2075-1729/4/2/189/xml |
| article pdf uploaded. | 5 May 2014 11:24 CEST | Version of Record | https://www.mdpi.com/2075-1729/4/2/189/pdf |
