| article html file updated | 6 February 2020 04:17 CET | Update | https://www.mdpi.com/2220-9964/2/3/869 |
| article html file updated | 8 May 2019 00:40 CEST | Update | - |
| article html file updated | 21 March 2019 04:19 CET | Update | - |
| article html file updated | 17 June 2015 13:03 CEST | Original file | - |
| article pdf uploaded. | 11 September 2013 15:57 CEST | Updated version of record | https://www.mdpi.com/2220-9964/2/3/869/pdf |
| article pdf uploaded. | 10 September 2013 09:44 CEST | Version of Record | https://www.mdpi.com/2220-9964/2/3/869/pdf-vor |
