| article html file updated | 6 February 2020 07:30 CET | Update | https://www.mdpi.com/2073-4336/5/1/53 |
| article html file updated | 20 September 2019 06:09 CEST | Update | - |
| article html file updated | 7 May 2019 18:10 CEST | Update | - |
| article html file updated | 21 March 2019 12:54 CET | Update | - |
| article html file updated | 19 August 2015 21:32 CEST | Original file | - |
| article pdf uploaded. | 6 March 2014 16:00 CET | Updated version of record | https://www.mdpi.com/2073-4336/5/1/53/pdf |
| article pdf uploaded. | 25 February 2014 15:24 CET | Updated version of record | https://www.mdpi.com/2073-4336/5/1/53/pdf-vor |
| article pdf uploaded. | 25 February 2014 09:42 CET | Version of Record | https://www.mdpi.com/2073-4336/5/1/53/pdf-vor |
