| article html file updated | 6 February 2020 06:55 CET | Update | https://www.mdpi.com/1999-4915/6/2/371 |
| article html file updated | 7 May 2019 19:24 CEST | Update | - |
| article html file updated | 21 March 2019 11:31 CET | Update | - |
| article html file updated | 19 August 2015 18:40 CEST | Update | - |
| article html file updated | 18 March 2014 09:59 CET | Original file | - |
| article xml file uploaded | 18 March 2014 09:59 CET | Original file | https://www.mdpi.com/1999-4915/6/2/371/xml |
| article pdf uploaded. | 24 January 2014 12:13 CET | Version of Record | https://www.mdpi.com/1999-4915/6/2/371/pdf |
