| article html file updated | 6 February 2020 06:28 CET | Update | https://www.mdpi.com/2072-6694/6/1/67 |
| article html file updated | 7 May 2019 20:21 CEST | Update | - |
| article html file updated | 21 March 2019 10:12 CET | Update | - |
| article html file updated | 19 August 2015 15:41 CEST | Update | - |
| article html file updated | 28 April 2014 10:39 CEST | Original file | - |
| article xml file uploaded | 28 April 2014 10:39 CEST | Original file | https://www.mdpi.com/2072-6694/6/1/67/xml |
| article pdf uploaded. | 27 December 2013 17:47 CET | Version of Record | https://www.mdpi.com/2072-6694/6/1/67/pdf |
