| article html file updated | 6 February 2020 17:38 CET | Update | https://www.mdpi.com/2227-7390/3/2/171 |
| article html file updated | 6 May 2019 21:58 CEST | Update | - |
| article html file updated | 26 March 2019 00:37 CET | Update | - |
| article html file updated | 21 August 2015 10:25 CEST | Update | - |
| article html file updated | 24 July 2015 08:40 CEST | Original file | - |
| article xml file uploaded | 24 July 2015 08:40 CEST | Original file | https://www.mdpi.com/2227-7390/3/2/171/xml |
| article pdf uploaded. | 16 April 2015 09:06 CEST | Updated version of record | https://www.mdpi.com/2227-7390/3/2/171/pdf |
| article pdf uploaded. | 15 April 2015 09:53 CEST | Version of Record | https://www.mdpi.com/2227-7390/3/2/171/pdf-vor |
