| article html file updated | 6 February 2020 09:15 CET | Update | https://www.mdpi.com/1424-8247/7/5/621 |
| article html file updated | 7 May 2019 14:32 CEST | Update | N/A |
| article html file updated | 21 March 2019 17:04 CET | Update | N/A |
| article html file updated | 20 August 2015 06:58 CEST | Update | N/A |
| article html file updated | 5 June 2014 09:44 CEST | Original file | N/A |
| article xml file uploaded | 5 June 2014 09:44 CEST | Original file | https://www.mdpi.com/1424-8247/7/5/621/xml |
| article pdf uploaded. | 14 May 2014 14:52 CEST | Version of Record | https://www.mdpi.com/1424-8247/7/5/621/pdf |
