| article html file updated | 6 February 2020 19:30 CET | Update | https://www.mdpi.com/1424-8247/8/2/303 |
| article html file updated | 6 May 2019 18:09 CEST | Update | - |
| article html file updated | 26 March 2019 04:25 CET | Update | - |
| article html file updated | 27 October 2017 10:40 CEST | Update | - |
| article html file updated | 21 August 2015 13:21 CEST | Update | - |
| article html file updated | 7 July 2015 04:43 CEST | Original file | - |
| article xml file uploaded | 7 July 2015 04:43 CEST | Original file | https://www.mdpi.com/1424-8247/8/2/303/xml |
| article pdf uploaded. | 10 June 2015 14:32 CEST | Updated version of record | https://www.mdpi.com/1424-8247/8/2/303/pdf |
| article pdf uploaded. | 9 June 2015 11:13 CEST | Version of Record | https://www.mdpi.com/1424-8247/8/2/303/pdf-vor |
