| article html file updated | 6 February 2020 06:28 CET | Update | https://www.mdpi.com/1999-4915/6/1/54 |
| article html file updated | 7 May 2019 20:20 CEST | Update | N/A |
| article html file updated | 21 March 2019 10:14 CET | Update | N/A |
| article html file updated | 19 August 2015 15:42 CEST | Update | N/A |
| article html file updated | 17 February 2014 12:45 CET | Original file | N/A |
| article xml file uploaded | 17 February 2014 12:45 CET | Original file | https://www.mdpi.com/1999-4915/6/1/54/xml |
| article pdf uploaded. | 30 December 2013 08:50 CET | Version of Record | https://www.mdpi.com/1999-4915/6/1/54/pdf |
