| article html file updated | 6 February 2020 00:14 CET | Update | https://www.mdpi.com/2075-4698/3/1/80 |
| article html file updated | 8 May 2019 09:15 CEST | Update | N/A |
| article html file updated | 20 March 2019 17:49 CET | Update | N/A |
| article html file updated | 17 June 2015 05:52 CEST | Update | N/A |
| article html file updated | 8 February 2013 09:42 CET | Original file | N/A |
| article pdf uploaded. | 25 January 2013 14:50 CET | Version of Record | https://www.mdpi.com/2075-4698/3/1/80/pdf |
