| article html file updated | 6 February 2020 20:12 CET | Update | https://www.mdpi.com/2218-2004/3/3/273 |
| article html file updated | 6 May 2019 16:43 CEST | Update | - |
| article html file updated | 26 March 2019 05:41 CET | Update | - |
| article html file updated | 15 October 2015 11:57 CEST | Update | - |
| article xml file uploaded | 15 October 2015 11:57 CEST | Original file | https://www.mdpi.com/2218-2004/3/3/273/xml |
| article html file updated | 21 August 2015 14:18 CEST | Original file | - |
| article supplementary file uploaded. | 30 June 2015 14:52 CEST | - | https://www.mdpi.com/2218-2004/3/3/273#supplementary |
| article pdf uploaded. | 30 June 2015 14:51 CEST | Version of Record | https://www.mdpi.com/2218-2004/3/3/273/pdf |
