| article html file updated | 6 February 2020 08:21 CET | Update | https://www.mdpi.com/2072-6694/6/2/756 |
| article html file updated | 7 May 2019 16:26 CEST | Update | N/A |
| article html file updated | 21 March 2019 14:54 CET | Update | N/A |
| article html file updated | 20 August 2015 02:03 CEST | Update | N/A |
| article html file updated | 30 June 2014 09:44 CEST | Original file | N/A |
| article xml file uploaded | 30 June 2014 09:44 CEST | Original file | https://www.mdpi.com/2072-6694/6/2/756/xml |
| article pdf uploaded. | 2 April 2014 15:52 CEST | Version of Record | https://www.mdpi.com/2072-6694/6/2/756/pdf |
