| article html file updated | 6 February 2020 06:30 CET | Update | https://www.mdpi.com/1999-4915/6/1/89 |
| article html file updated | 7 May 2019 20:16 CEST | Update | - |
| article html file updated | 21 March 2019 10:20 CET | Update | - |
| article html file updated | 19 August 2015 16:04 CEST | Update | - |
| article html file updated | 17 February 2014 12:46 CET | Original file | - |
| article xml file uploaded | 17 February 2014 12:46 CET | Original file | https://www.mdpi.com/1999-4915/6/1/89/xml |
| article pdf uploaded. | 31 December 2013 11:12 CET | Version of Record | https://www.mdpi.com/1999-4915/6/1/89/pdf |
