| article html file updated | 6 February 2020 05:05 CET | Update | https://www.mdpi.com/2076-0760/2/4/234 |
| article html file updated | 20 September 2019 02:24 CEST | Update | N/A |
| article html file updated | 7 May 2019 22:57 CEST | Update | N/A |
| article html file updated | 21 March 2019 06:27 CET | Update | N/A |
| article html file updated | 16 February 2017 03:27 CET | Original file | N/A |
| article pdf uploaded. | 23 October 2013 15:44 CEST | Updated version of record | https://www.mdpi.com/2076-0760/2/4/234/pdf |
| article pdf uploaded. | 23 October 2013 09:46 CEST | Version of Record | https://www.mdpi.com/2076-0760/2/4/234/pdf-vor |
