| article html file updated | 7 February 2020 00:11 CET | Update | https://www.mdpi.com/2226-4310/2/4/602 |
| article html file updated | 6 May 2019 08:32 CEST | Update | - |
| article html file updated | 26 March 2019 13:17 CET | Original file | - |
| article pdf uploaded. | 3 November 2015 03:06 CET | Updated version of record | https://www.mdpi.com/2226-4310/2/4/602/pdf |
| article pdf uploaded. | 23 October 2015 15:12 CEST | Version of Record | https://www.mdpi.com/2226-4310/2/4/602/pdf-vor |
