| article html file updated | 6 February 2020 06:49 CET | Update | https://www.mdpi.com/1999-4915/6/1/301 |
| article html file updated | 7 May 2019 19:37 CEST | Update | N/A |
| article html file updated | 21 March 2019 11:14 CET | Update | N/A |
| article html file updated | 19 August 2015 18:03 CEST | Update | N/A |
| article html file updated | 17 February 2014 12:51 CET | Original file | N/A |
| article xml file uploaded | 17 February 2014 12:50 CET | Original file | https://www.mdpi.com/1999-4915/6/1/301/xml |
| article pdf uploaded. | 20 January 2014 12:46 CET | Version of Record | https://www.mdpi.com/1999-4915/6/1/301/pdf |
