| article html file updated | 6 February 2020 07:29 CET | Update | https://www.mdpi.com/2073-4441/6/2/434 |
| article html file updated | 20 September 2019 06:08 CEST | Update | - |
| article html file updated | 7 May 2019 18:12 CEST | Update | - |
| article html file updated | 21 March 2019 12:53 CET | Update | - |
| article html file updated | 19 August 2015 21:31 CEST | Update | - |
| article html file updated | 21 May 2014 08:10 CEST | Original file | - |
| article xml file uploaded | 21 May 2014 08:10 CEST | Original file | https://www.mdpi.com/2073-4441/6/2/434/xml |
| article pdf uploaded. | 25 February 2014 10:21 CET | Updated version of record | https://www.mdpi.com/2073-4441/6/2/434/pdf |
| article pdf uploaded. | 24 February 2014 13:40 CET | Version of Record | https://www.mdpi.com/2073-4441/6/2/434/pdf-vor |
