| article html file updated | 6 February 2020 04:33 CET | Update | https://www.mdpi.com/2077-0472/3/4/629 |
| article html file updated | 20 September 2019 01:23 CEST | Update | - |
| article html file updated | 8 May 2019 00:05 CEST | Update | - |
| article html file updated | 21 March 2019 04:59 CET | Update | - |
| article html file updated | 17 June 2015 13:27 CEST | Original file | - |
| article pdf uploaded. | 15 October 2013 18:05 CEST | Updated version of record | https://www.mdpi.com/2077-0472/3/4/629/pdf |
| article pdf uploaded. | 25 September 2013 16:32 CEST | Version of Record | https://www.mdpi.com/2077-0472/3/4/629/pdf-vor |
