| article html file updated | 6 February 2020 02:18 CET | Update | https://www.mdpi.com/1660-3397/11/6/1800 |
| article html file updated | 8 May 2019 04:46 CEST | Update | - |
| article html file updated | 20 March 2019 22:58 CET | Update | - |
| article html file updated | 17 June 2015 09:39 CEST | Update | - |
| article html file updated | 6 August 2013 15:51 CEST | Original file | - |
| article xml file uploaded | 6 August 2013 15:51 CEST | Original file | https://www.mdpi.com/1660-3397/11/6/1800/xml |
| article pdf uploaded. | 24 May 2013 14:28 CEST | Version of Record | https://www.mdpi.com/1660-3397/11/6/1800/pdf |
