| article html file updated | 6 February 2020 02:28 CET | Update | https://www.mdpi.com/2072-6643/5/6/1970 |
| article html file updated | 8 May 2019 04:24 CEST | Update | - |
| article html file updated | 20 March 2019 23:23 CET | Update | - |
| article html file updated | 17 June 2015 09:57 CEST | Update | - |
| article html file updated | 6 August 2013 15:58 CEST | Original file | - |
| article xml file uploaded | 6 August 2013 15:58 CEST | Original file | https://www.mdpi.com/2072-6643/5/6/1970/xml |
| article pdf uploaded. | 4 June 2013 10:02 CEST | Version of Record | https://www.mdpi.com/2072-6643/5/6/1970/pdf |
