| article html file updated | 5 February 2020 16:44 CET | Update | https://www.mdpi.com/2078-1547/2/1/37 |
| article html file updated | 8 January 2020 13:14 CET | Update | N/A |
| article html file updated | 19 September 2019 03:20 CEST | Update | N/A |
| article html file updated | 9 May 2019 01:52 CEST | Update | N/A |
| article html file updated | 20 March 2019 06:03 CET | Update | N/A |
| article html file updated | 16 June 2015 14:36 CEST | Update | N/A |
| article html file updated | 6 February 2013 20:08 CET | Update | N/A |
| article html file updated | 6 February 2013 00:00 CET | Update | N/A |
| article html file updated | 28 January 2013 21:30 CET | Update | N/A |
| article html file updated | 26 January 2013 01:23 CET | Update | N/A |
| article html file updated | 22 January 2013 11:45 CET | Original file | N/A |
