| article html file updated | 6 February 2020 00:08 CET | Update | https://www.mdpi.com/2073-445X/2/1/20 |
| article html file updated | 8 May 2019 09:29 CEST | Update | - |
| article html file updated | 20 March 2019 17:34 CET | Update | - |
| article html file updated | 17 June 2015 05:40 CEST | Update | - |
| article html file updated | 14 August 2014 12:06 CEST | Update | - |
| article xml file uploaded | 14 August 2014 12:06 CEST | Update | https://www.mdpi.com/2073-445X/2/1/20/xml |
| article html file updated | 8 February 2013 09:35 CET | Update | - |
| article html file updated | 7 February 2013 17:55 CET | Update | - |
| article html file updated | 7 February 2013 15:58 CET | Original file | - |
| article xml uploaded. | 7 February 2013 15:58 CET | Original file | - |
| article pdf uploaded. | 22 January 2013 08:49 CET | Version of Record | https://www.mdpi.com/2073-445X/2/1/20/pdf |
