| article html file updated | 6 February 2020 08:40 CET | Update | https://www.mdpi.com/1422-0067/15/4/6556 |
| article html file updated | 7 May 2019 15:45 CEST | Update | - |
| article html file updated | 21 March 2019 15:40 CET | Update | - |
| article html file updated | 20 August 2015 03:34 CEST | Update | - |
| article html file updated | 12 May 2014 11:40 CEST | Update | - |
| article xml file uploaded | 12 May 2014 11:40 CEST | Update | https://www.mdpi.com/1422-0067/15/4/6556/xml |
| article html file updated | 12 May 2014 11:06 CEST | Original file | - |
| article xml file uploaded | 12 May 2014 11:05 CEST | Original file | - |
| article pdf uploaded. | 17 April 2014 09:25 CEST | Version of Record | https://www.mdpi.com/1422-0067/15/4/6556/pdf |
