| article html file updated | 6 February 2020 09:01 CET | Update | https://www.mdpi.com/2075-4434/2/2/263 |
| article html file updated | 7 May 2019 15:01 CEST | Update | N/A |
| article html file updated | 21 March 2019 16:30 CET | Original file | N/A |
| article pdf uploaded. | 6 May 2014 08:22 CEST | Updated version of record | https://www.mdpi.com/2075-4434/2/2/263/pdf |
| article pdf uploaded. | 5 May 2014 10:43 CEST | Version of Record | https://www.mdpi.com/2075-4434/2/2/263/pdf-vor |
