| article html file updated | 6 February 2020 04:37 CET | Update | https://www.mdpi.com/2226-4787/1/2/94 |
| article html file updated | 7 May 2019 23:56 CEST | Update | - |
| article html file updated | 21 March 2019 05:10 CET | Update | - |
| article html file updated | 17 June 2015 13:31 CEST | Original file | - |
| article pdf uploaded. | 2 October 2013 11:33 CEST | Updated version of record | https://www.mdpi.com/2226-4787/1/2/94/pdf |
| article pdf uploaded. | 27 September 2013 14:36 CEST | Updated version of record | https://www.mdpi.com/2226-4787/1/2/94/pdf-vor |
| article pdf uploaded. | 27 September 2013 14:35 CEST | Version of Record | https://www.mdpi.com/2226-4787/1/2/94/pdf-vor |
