| article html file updated | 6 February 2020 15:19 CET | Update | https://www.mdpi.com/1999-4915/7/1/306 |
| article html file updated | 7 May 2019 02:12 CEST | Update | N/A |
| article html file updated | 25 March 2019 20:44 CET | Update | N/A |
| article html file updated | 21 August 2015 06:10 CEST | Update | N/A |
| article html file updated | 27 January 2015 07:39 CET | Original file | N/A |
| article xml file uploaded | 27 January 2015 07:39 CET | Original file | https://www.mdpi.com/1999-4915/7/1/306/xml |
| article pdf uploaded. | 20 January 2015 11:59 CET | Version of Record | https://www.mdpi.com/1999-4915/7/1/306/pdf |
