| article html file updated | 6 February 2020 02:35 CET | Update | https://www.mdpi.com/1999-4915/5/6/1447 |
| article html file updated | 8 May 2019 04:09 CEST | Update | N/A |
| article html file updated | 20 March 2019 23:41 CET | Update | N/A |
| article html file updated | 17 June 2015 10:10 CEST | Update | N/A |
| article html file updated | 6 August 2013 16:11 CEST | Original file | N/A |
| article xml file uploaded | 6 August 2013 16:11 CEST | Original file | https://www.mdpi.com/1999-4915/5/6/1447/xml |
| article pdf uploaded. | 10 June 2013 14:55 CEST | Version of Record | https://www.mdpi.com/1999-4915/5/6/1447/pdf |
