| article html file updated | 6 February 2020 13:40 CET | Update | https://www.mdpi.com/2079-3197/2/4/199 |
| article html file updated | 7 May 2019 05:28 CEST | Update | N/A |
| article html file updated | 25 March 2019 17:46 CET | Original file | N/A |
| article pdf uploaded. | 17 November 2014 09:02 CET | Updated version of record | https://www.mdpi.com/2079-3197/2/4/199/pdf |
| article pdf uploaded. | 14 November 2014 16:44 CET | Version of Record | https://www.mdpi.com/2079-3197/2/4/199/pdf-vor |
