| article html file updated | 6 February 2020 19:42 CET | Update | https://www.mdpi.com/1999-4893/8/2/309 |
| article html file updated | 6 May 2019 17:44 CEST | Update | N/A |
| article html file updated | 26 March 2019 04:47 CET | Update | N/A |
| article html file updated | 21 August 2015 13:39 CEST | Update | N/A |
| article html file updated | 8 July 2015 10:59 CEST | Original file | N/A |
| article xml file uploaded | 8 July 2015 10:59 CEST | Original file | https://www.mdpi.com/1999-4893/8/2/309/xml |
| article pdf uploaded. | 15 June 2015 14:30 CEST | Version of Record | https://www.mdpi.com/1999-4893/8/2/309/pdf |
