| article html file updated | 6 February 2020 05:52 CET | Update | https://www.mdpi.com/2073-4360/5/4/1339 |
| article html file updated | 7 May 2019 21:28 CEST | Update | - |
| article html file updated | 21 March 2019 08:32 CET | Update | - |
| article html file updated | 19 August 2015 11:47 CEST | Original file | - |
| article pdf uploaded. | 9 December 2013 14:52 CET | Updated version of record | https://www.mdpi.com/2073-4360/5/4/1339/pdf |
| article pdf uploaded. | 29 November 2013 10:46 CET | Version of Record | https://www.mdpi.com/2073-4360/5/4/1339/pdf-vor |
