| article html file updated | 5 February 2020 19:02 CET | Update | https://www.mdpi.com/2218-1989/2/1/39 |
| article html file updated | 8 May 2019 21:09 CEST | Update | N/A |
| article html file updated | 25 March 2019 08:36 CET | Update | N/A |
| article html file updated | 16 June 2015 20:58 CEST | Update | N/A |
| article html file updated | 7 January 2014 12:22 CET | Update | N/A |
| article xml file uploaded | 7 January 2014 12:22 CET | Update | https://www.mdpi.com/2218-1989/2/1/39/xml |
| article html file updated | 30 August 2013 09:11 CEST | Update | N/A |
| article xml file uploaded | 30 August 2013 09:11 CEST | Original file | N/A |
| article html file updated | 7 February 2013 09:37 CET | Update | N/A |
| article html file updated | 7 February 2013 00:09 CET | Update | N/A |
| article html file updated | 6 February 2013 05:26 CET | Update | N/A |
| article html file updated | 29 January 2013 01:12 CET | Update | N/A |
| article html file updated | 26 January 2013 07:20 CET | Update | N/A |
| article html file updated | 23 January 2013 07:01 CET | Original file | N/A |
