| article html file updated | 6 February 2020 06:51 CET | Update | https://www.mdpi.com/2079-7737/3/1/39 |
| article html file updated | 7 May 2019 19:33 CEST | Update | - |
| article html file updated | 21 March 2019 11:19 CET | Update | - |
| article html file updated | 19 August 2015 18:17 CEST | Update | - |
| article html file updated | 28 April 2014 10:28 CEST | Update | - |
| article xml file uploaded | 28 April 2014 10:28 CEST | Update | https://www.mdpi.com/2079-7737/3/1/39/xml |
| article html file updated | 23 January 2014 09:33 CET | Original file | - |
| article xml uploaded. | 23 January 2014 09:33 CET | Original file | - |
| article pdf uploaded. | 21 January 2014 15:13 CET | Version of Record | https://www.mdpi.com/2079-7737/3/1/39/pdf |
