| article html file updated | 6 February 2020 02:25 CET | Update | https://www.mdpi.com/2073-4336/4/2/208 |
| article html file updated | 8 May 2019 04:30 CEST | Update | N/A |
| article html file updated | 20 March 2019 23:16 CET | Update | N/A |
| article html file updated | 17 June 2015 09:51 CEST | Update | N/A |
| article html file updated | 9 July 2014 09:51 CEST | Original file | N/A |
| article xml file uploaded | 9 July 2014 09:51 CEST | Original file | https://www.mdpi.com/2073-4336/4/2/208/xml |
| article pdf uploaded. | 30 May 2013 15:32 CEST | Version of Record | https://www.mdpi.com/2073-4336/4/2/208/pdf |
