| article html file updated | 6 February 2020 01:15 CET | Update | https://www.mdpi.com/1660-3397/11/4/975 |
| article html file updated | 8 May 2019 06:51 CEST | Update | - |
| article html file updated | 20 March 2019 20:21 CET | Update | - |
| article html file updated | 17 June 2015 07:58 CEST | Update | - |
| article html file updated | 30 April 2013 09:24 CEST | Original file | - |
| article xml uploaded. | 30 April 2013 09:24 CEST | Original file | https://www.mdpi.com/1660-3397/11/4/975/xml |
| article pdf uploaded. | 28 March 2013 17:49 CET | Updated version of record | https://www.mdpi.com/1660-3397/11/4/975/pdf |
| article pdf uploaded. | 27 March 2013 14:07 CET | Version of Record | https://www.mdpi.com/1660-3397/11/4/975/pdf-vor |
