| article html file updated | 6 February 2020 03:22 CET | Update | https://www.mdpi.com/2075-1680/2/3/404 |
| article html file updated | 19 September 2019 23:07 CEST | Update | N/A |
| article html file updated | 8 May 2019 02:34 CEST | Update | N/A |
| article html file updated | 21 March 2019 01:46 CET | Update | N/A |
| article html file updated | 19 December 2016 11:31 CET | Original file | N/A |
| article pdf uploaded. | 23 July 2013 11:19 CEST | Version of Record | https://www.mdpi.com/2075-1680/2/3/404/pdf |
